Tired of the same lunch on repeat? These vegetarian soups turn pantry staples into hearty, protein-packed bowls in a single Instant Pot cycle. Three plant-based recipes, all freezer-friendly, all built for the week ahead: a fibre-rich split pea and kale, a creamy curried lentil sweet potato, and a savoury mushroom barley stew. Skip the takeout and let the pressure cooker do the work.
Vegetarian Soups Quick Stats
Recipes in this collection: 3 vegetarian Instant Pot soups
Active prep: 15 minutes each | Total time: 30 to 45 minutes
Servings: 6 per recipe | Calories: 245 to 420 per bowl
Protein: 8g to 18g per serving | Fibre: 8g to 20g per serving
Nutrition varies by recipe. See each recipe card for exact macros.
Vegetarian Vegan Dairy-Free High-Protein Meal-Prep Friendly
Vegetarian Soups
Why These Vegetarian Soups Work
Legumes and grains are the backbone of a satisfying meatless lunch, and these three soups lean on them hard. Split peas and red lentils each deliver a generous dose of plant protein and fibre per bowl, which is what keeps you full through a long afternoon instead of reaching for a 3 p.m. snack. The mushroom barley stew brings the savoury, almost meaty depth that mushrooms and a splash of soy sauce create together, proving a vegetarian soup never has to taste like it’s missing something.
The Instant Pot is the real shortcut here. Dried split peas and lentils that would simmer for an hour or more on the stovetop soften completely in a single sealed cycle, and the pressure environment pulls flavour out of the aromatics and spices faster than an open pot ever could. That means a from-scratch, nutrient-dense lunch with maybe fifteen minutes of hands-on work.
Every one of these recipes is fully plant-based and dairy-free as written, built on a vegetable broth base with no animal products. They also scale and store beautifully: each makes six servings, and soups like these genuinely improve after a day in the fridge as the flavours marry. That makes them ideal candidates for a Sunday batch cook that carries you through the week.
The 3 Vegetarian Soups at a Glance
| Soup | Base | Total Time | Protein / Fibre | Best For |
|---|---|---|---|---|
| Split Pea & Kale | Yellow split peas | 45 min | 18g / 20g | Highest fibre, leanest |
| Curried Lentil & Sweet Potato | Red lentils | 30 min | 17g / 11g | Fastest, most warming |
| Mushroom Barley Stew | Pearl barley | 40 min | 8g / 8g | Lowest calorie, savoury |
1. Split Pea and Kale Soup (Instant Pot)
This protein-rich split pea soup pairs the earthiness of yellow split peas with fresh kale and a handful of aromatic vegetables. One sealed pressure cycle replaces hours of stovetop simmering, and each bowl delivers 18g of plant protein plus a remarkable 20g of fibre, making it the most filling soup in the collection. The recipe card below has the full ingredient list, timing, and step-by-step method.
Split Pea and Kale Soup (Instant Pot)
Ingredients
Equipment
Method
- Set the Instant Pot to Saute mode and dry saute the onion, carrots, and celery for about 5 minutes until they begin to soften. Add the garlic and cook for 1 minute more until fragrant.
- Add the rinsed split peas, vegetable broth, bay leaves, thyme, smoked paprika, and black pepper. Stir to combine.
- Lock the lid, set the valve to sealing, and pressure cook on high for 15 minutes. Allow a natural release for 15 minutes, then quick release any remaining pressure.
- Remove the bay leaves. Stir in the chopped kale and let it wilt for 2 to 3 minutes in the residual heat. Season with salt to taste and serve.
Nutrition
Notes
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Let us know how it was!2. Curried Lentil Sweet Potato Soup (Instant Pot)
This hearty, aromatic soup brings together red lentils, sweet potatoes, and warming curry spices, finished with a swirl of coconut milk for body and richness. It is the fastest of the three at just 30 minutes total, and the lentil-and-sweet-potato combination delivers steady, slow-release energy that holds up through a busy afternoon. Full recipe in the card below.
Curried Lentil Sweet Potato Soup (Instant Pot)
Ingredients
Equipment
Method
- Set the Instant Pot to Saute mode and heat the olive oil. Add the onion and cook until translucent, about 3 minutes. Add the garlic, curry powder, cumin, and turmeric and stir for 1 minute until fragrant.
- Add the sweet potatoes, lentils, diced tomatoes, and vegetable broth. Stir to combine.
- Lock the lid and pressure cook on high for 12 minutes. Allow a natural release for 10 minutes, then quick release the remaining pressure.
- Stir in the coconut milk and season with salt and pepper. Garnish with fresh cilantro before serving.
Nutrition
Notes
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Let us know how it was!3. Hearty Mushroom Barley Stew (Instant Pot)
This warming stew combines earthy mushrooms, nutty pearl barley, and vegetables in a rich, savoury broth. The Instant Pot develops the kind of deep, long-simmered flavour that usually takes a slow afternoon, while a splash of soy sauce adds the umami backbone that makes a meatless stew taste genuinely satisfying. At 245 calories a bowl, it is the lightest of the three. The recipe card has the full method.
Hearty Mushroom Barley Stew (Instant Pot)
Ingredients
Equipment
Method
- Set the Instant Pot to Saute mode and heat the olive oil. Add the onion, carrots, and celery and cook for 3 minutes. Add the mushrooms and garlic and saute for 5 minutes until the mushrooms release their liquid.
- Add the barley, vegetable broth, soy sauce, thyme, bay leaves, salt, and pepper. Stir to combine.
- Close the lid and set the valve to sealing. Cancel Saute mode and pressure cook on high for 20 minutes. When cooking is complete, allow a natural release for 5 minutes, then quick release the remaining pressure.
- Remove the bay leaves before serving.
Nutrition
Notes
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Let us know how it was!Chef’s Tips for Better Instant Pot Soups
Rinse your dried legumes thoroughly before they go in the pot. A quick pass under cold water in a colander removes debris and excess starch, which keeps both the split pea and the lentil soups from turning gluey or overly thick.
Hold the salt until the legumes are fully cooked. Salt added too early can keep split peas and lentils from softening properly, so season at the end and adjust to taste once the pressure has released.
Build flavour with the Saute function first. Taking five minutes to soften the onions, carrots, and celery, then bloom the garlic and spices, gives these soups a depth you simply can’t get by dumping everything in cold. For the mushroom barley stew, let the mushrooms release their liquid before adding the broth.
Expect the soups to thicken as they cool. All three set up considerably in the fridge thanks to the starch from the legumes and barley, so loosen them with a splash of warm broth or water when you reheat. For the curried lentil soup, hold the fresh cilantro until serving so it stays bright.
Storage & Serving
Refrigerator: Cool completely, then store in airtight containers for up to 5 days. All three soups taste even better on day two as the flavours marry.
Freezer: These freeze beautifully for up to 3 months. Leave an inch of headspace for expansion and thaw overnight in the fridge before reheating. For the curried lentil soup, freeze before adding the cilantro garnish.
Reheat: Warm gently on the stovetop or in the microwave, adding a splash of homemade vegetable broth to loosen the texture, since all three thicken as they sit.
Meal prep: Portion into single-serving containers straight after cooking for grab-and-go lunches all week. Pair a bowl with crusty bread or a simple green salad to round out the meal. If you love batch-cooking soup, the leek and potato soup and these spring soup recipes are easy additions to the rotation.
Frequently Asked Questions
Are these vegetarian soups also vegan?
Yes. All three recipes are fully vegan as written, built on a vegetable broth base with no dairy, eggs, or meat. The curried lentil soup gets its creaminess from coconut milk rather than cream, and the mushroom barley stew uses soy sauce instead of any animal-based seasoning.
Which vegetarian soup is best for meal prep?
The split pea and kale soup is the standout meal-prep choice thanks to its 18g of protein and 20g of fibre per serving, which keep lunches genuinely filling. All three hold for 5 days in the fridge and freeze for up to 3 months, and like most legume soups, they actually improve as the flavours marry overnight.
Can I make these soups without an Instant Pot?
Yes, every recipe works on the stovetop, but plan for 2 to 3 times the cooking time. Split peas and lentils that pressure cook in 12 to 15 minutes need 45 to 90 minutes of simmering instead. The Instant Pot’s biggest advantage shows up with the dried legumes and the barley, which traditionally need long, slow cooking.
Are vegetarian soups gluten-free?
The split pea, kale, and curried lentil sweet potato soups are naturally gluten-free. The mushroom barley stew is not, since barley contains gluten and standard soy sauce does too; swap in tamari for the soy sauce, but the barley itself keeps that recipe off a strict gluten-free menu.
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Final Thoughts Regarding Vegetarian Soups
These three vegetarian soups prove that a plant-based lunch can be fast, filling, and genuinely crave-worthy. Toss the ingredients into your Instant Pot, let the pressure do the work, and you have hearty, nutritious meals ready for the week ahead. Whether you reach for the savoury mushroom barley, the high-fibre split pea, or the aromatic curried lentil, your future self will thank you.
Medical Disclaimer: This content is for informational purposes only and is not a substitute for professional medical or nutritional advice. Nutrition values are estimates and may vary based on specific ingredients and portion sizes. If you are managing diabetes or another health condition, consult your healthcare provider or a registered dietitian before making dietary changes.
