Add in cumin, chili powder, tomato paste, and carrots. Stir well to incorporate and cook for 5 minutes, or until fragrant.
Add in sweet potatoes, chopped veggies, bouillon cube, and water. Cover the pot and bring to a boil, then reduce the heat to low. Stir well to make sure the bouillon cube has dissolved.
Simmer for 10-15 minutes, or until all the vegetables are tender.
Stir in chickpeas, peanut butter, and red chili flakes. Simmer for 3-5 more minutes to let the flavors mingle.
Season with salt, pepper, and lemon juice to taste, then serve warm.