Heat oil in a pot, add chopped onions, ginger-garlic and green chili (if you like it spicy!) to it. Let it cook until onions go brown.
Add chopped tomatoes to the pan and let it soften.
Add cumin powder, paprika and salt. Mix well until you get a rich gravy.
Drain the lentils and add it to the gravy.
Add 2 cups of water and let it come to a boil.
Let it simmer on a medium low flame, until the lentils are cooked.
Cook further until you get a curry which has dried a bit. Too much water in it will make the buns runny.
Place the curried lentils between the toasted bun slices along with chopped red pepper and serve fresh.
Vegan lentil sloppy joes in slow cooker
To make sloppy joes in slow cooker, follow the initial steps to make the curry paste with onions, tomatoes and spices.Add the soaked lentils
Add water (2X times the quantity of lentils that were originally soaked) and cook in slow cooker or instant pot (Hi on Slow cook mode and in seal position) for 5 hours atleast.Once done, add more water or cook more to reduce water as per your liking.
Serve these lentil sloppy joes between the toasted bun slices along with chopped red pepper and serve fresh.
Notes
Add more water if required,once its cooked, it will get more drier