Sweet Potato Lentil Dhal with Spinach
One sweet potato, a handful of cheap red lentils and a few pantry spices turn into the coziest one-pot dinner you’ll make all week. This sweet potato lentil dhal costs pennies per bowl, yet it eats like real comfort food. Red split lentils are one of the cheapest proteins you can buy, and they bring a big hit of plant protein and fiber.
Sweet potato adds natural sweetness plus beta carotene, which your body turns into vitamin A. Spinach folds in iron and vitamin K at the very end.
Everything simmers in a single pan, so the flavor builds and the washing up stays tiny. It is naturally vegan, freezer-friendly, and built from ingredients you probably already have in the cupboard.
Why You’ll Love This Recipe
- It is genuinely cheap. Dried lentils, one sweet potato and basic ground spices feed two people for very little.
- One pot, under 40 minutes. Soften, simmer, stir in the greens. That is the whole job.
- High in protein and fiber. Lentils and sweet potato keep you full for hours without any meat.
- Big, warm flavor. Cumin, turmeric, fresh ginger and chilli make every spoonful taste like a slow-cooked curry.
Fabian’s Budget & Health Tip: Buy dried red split lentils in a big bag instead of cans. They cost a fraction of the price, store for months, and cook in 20 minutes with no draining. For an even cheaper batch, swap fresh spinach for a couple of cubes of frozen spinach. You lose nothing in nutrition, and it keeps in your freezer for weeks.
Ingredients (Serves 2)
- 1 tbsp olive oil
- 1 small red onion (or ½ large), finely chopped
- 1 garlic clove, crushed
- 2 tsp fresh ginger (about half a thumb), grated
- ½ red chilli, finely chopped (keep the seeds in for more heat)
- ¾ tsp ground turmeric
- ¾ tsp ground cumin
- 1 medium sweet potato (9 oz / 250g), peeled and cut into ¾ inch chunks
- ⅔ cup / 125g dried red split lentils, rinsed
- 1¼ cups / 300ml vegetable stock
- 1½ cups / 40g fresh spinach
- 2 spring onions, sliced on the diagonal
- Small handful fresh basil, torn
- Salt and black pepper, to taste
Step-by-Step Instructions
🧅 Soften the Onion
Heat the olive oil in a wide pan over low heat. Add the red onion and cook gently for about 10 minutes, stirring now and then. You want the pieces to turn soft, glassy and pale gold. Listen for a low, lazy sizzle, not a sharp crackle. Low and slow here is what gives the dhal its sweet base.
🧄 Bloom the Spices
Stir in the garlic, ginger and chilli. Cook for 1 minute, until they smell sharp and fragrant. Now add the turmeric and cumin. Stir for 1 more minute and watch the oil turn a deep golden orange. Wait until your kitchen smells warm and toasty. That is the spices waking up.
🍠 Coat the Sweet Potato
Turn the heat up to medium. Tip in the sweet potato chunks. Stir until every piece wears a glossy orange spice coat. The edges will start to look slick and shiny.
🍲 Add the Lentils and Stock
Pour in the rinsed lentils and the vegetable stock. Add a good pinch of salt and pepper. Stir once to settle everything. Bring it up to a gentle boil, where big, slow bubbles break the surface.
⏲️ Simmer Low and Slow
Drop the heat back to low, cover the pan, and cook for about 20 minutes. The dhal will thicken into a soft, creamy porridge. The sweet potato should hold its shape but slide off a fork with no effort. Give it a stir near the end so nothing catches on the bottom.
🥬 Wilt the Spinach
Taste and adjust the salt. Stir in the spinach a handful at a time. Watch it collapse and turn deep emerald green in seconds. It folds straight into the dhal.
🌿 Top and Serve
Spoon the dhal into warm bowls. Scatter the sliced spring onions and torn basil over the top for a fresh, peppery finish. Serve on its own, or with rice or warm naan to scoop.
Expert Troubleshooting & FAQs
What if my dhal is too thick?
Lentils keep drinking liquid as they sit, so this is normal. Just loosen it with a splash of hot stock or water and stir over low heat until it is creamy again. If it is too thin, simmer uncovered for a few more minutes.
Can I use a different kind of lentil?
Red split lentils are best here because they break down into that soft, creamy texture in 20 minutes. Brown or green lentils stay firm and take longer to cook, so you would need extra stock and extra time. For this quick weeknight version, stick with red split lentils.
Can I make it ahead or freeze it?
Yes, and it gets even better. The dhal keeps in the fridge for up to 3 days, and the flavor deepens overnight. It also freezes well for up to a month. Stir the spinach in fresh when you reheat so it stays bright green.
Estimated Nutritional Facts (Per Serving)
- Calories: about 410
- Protein: about 18g
- Carbs: about 63g
- Fat: about 8g
These are rough estimates and do not include rice or naan on the side.
