Vegan Lentil Sloppy Joes

Step 1
Combine onion and both bell peppers in the bowl of a food processor; pulse until blended into a uniform size but not liquid.

Step 2
Heat olive oil in a large pot over medium-high heat. Add onion-bell pepper mixture, carrot, and zucchini. Cook and stir until soft and heated through, 6 to 8 minutes.

Step 3
Add broth and lentils; bring to a boil. Reduce heat and simmer, uncovered and stirring occasionally, until lentils are tender, about 15 minutes.

Step 4
Stir in tomatoes, chili powder, mustard, vinegar, maple syrup, tomato paste, Worcestershire sauce, salt, and pepper; bring to a boil. Reduce heat and simmer until thickened, about 10 minutes. Serve on buns.