This is adapted from a recent Bon Appetit  recipe; the squash is a great addition.
1 tablespoon olive oil
1 onion, chopped
2 teaspoons minced garlic
2 tablespoons chili powder
1 (29 ounce) can fire-roasted tomatoes (you can use regular whole tomatoes if you’re stuck)
2 (15 ounce) cans black beans, drained
2 chipotle chiles from canned chipotle chiles in adobo, minced (make sure to mince; these are VERY spicy)
1 (2 pound) butternut squash, peeled, seeded and cut into 1/2 –inch cubes
Grated Cheddar Cheese
Pickled Jalapeno Rings
Heat oil in a Dutch oven over medium heat. Sauté onion and garlic until soft. Add chili powder, tomatoes, beans and chiles and cook for about ½ hour to blend flavors. Stir in butternut squash and cook an additional 30 minutes. Serve over rice. I like it without any garnish but it’s nice to give everyone options.