Amy's Vegan Chili

Heat oil in a medium Dutch oven over medium heat; stir in onion, green and red bell peppers, and garlic. Cook and stir until vegetables have softened, about 5 minutes.

Mash 1/2 of the black beans in a small bowl. Transfer to the Dutch oven with the remaining whole black beans. Add diced tomatoes, 2 cups water, corn, lentils, quinoa, chili powder, brown sugar, paprika, salt, turmeric, oregano, cumin, red pepper flakes, and black pepper; stir to combine. Bring to a boil, then reduce heat to low and simmer, stirring occasionally, for 2 hours.

Make a slurry by mixing cornstarch with 3 tablespoons water until completely dissolved, adding more water if necessary. Stir slurry into the chili and simmer until thickened, about 15 minutes. Mash chili with a potato masher to desired consistency.