Step 1

Heat olive oil in a large skillet over medium high heat. Add ground beef and cook until browned, about 3-5 minutes, making sure to crumble the beef as it cooks; drain excess fat and remove from heat.

Step 2

Stir in black beans, corn, salsa, green chiles, taco seasoning and enchilada sauce, reserving 1/2 cup.

Step 3

Lightly coat the inside of a slow cooker with nonstick spray. Place 1 tortilla on the bottom of the slow cooker. Spread 1/3 ground beef mixture evenly over the top; sprinkle with 1/2 cup cheese. Repeat with 2 more layers; top with remaining tortilla, enchilada sauce, and cheese.

Step 4

Cover and cook on low heat for 3-4 hours or high heat for 2-3 hours.

Step 5

Serve immediately, garnished with avocado, tomato and cilantro, if desired.