Step 1

Place the onion, bell pepper, black beans, corn, chili powder, cumin, salt, 1/2 cup of the cheese, and meat (if using) in a medium bowl and stir to combine. Spread about 1 cup of the salsa over the bottom of a 6-quart (or larger) slow cooker, enough to evenly coat the bottom with a bit of sauce.

Step 2

Fill each of the tortillas with about 1/3 cup of the filling, roll them up as tightly as you can, and pack them seam-side down in a single layer into the bottom of the slow cooker. Don't worry if some filling falls out — just tuck it back in once you've set the tortilla down.

Step 3

When you complete the first layer (you will make 3 layers), spread about another cup of salsa over the top and sprinkle with about 1/2 cup of the remaining cheese. Continue rolling the remaining tortillas with the remaining filling to make one more layer; if you have leftover filling, sprinkle this over the top. Finish by pouring the 1 cup of the salsa evenly over the top of the enchiladas. Reserve the last 1/2 cup of cheese to add later.

Step 4

Cover and cook on HIGH the setting for 2 to 4 hours. In the last 15 minutes of cooking, sprinkle the remaining 1/2 cup of cheese over the top, re-cover the slow cooker, and finish cooking. Serve the enchiladas with any remaining salsa.