1Brush inside of 3 1/2 or 4 quart slow cooker with oil or spray with non-stick cooking spray.
In 10 inch skillet, cook ground beef with onion and garlic over medium-high heat 8-10 minutes, stirring frequently, until thoroughly cooked; drain. Stir in taco seasoning mix, salt and pepper.
2Place 3 tortillas in bottom of slow cooker. Top with beef mixture, broth, tomato sauce and enchilada sauce. Sprinkle with 1/2 cup of the cheese. Layer 3 more tortillas. Top with beans, corn green chilies, half the olives and 1/2 cup of the cheese.
Top with remaining 3 tortillas. Sprinkle with remaining 1/2 cup cheese and olives. Cover; cook on high setting 2 1/2 - 3 hours or on low for 6-7 hours. Uncover slow cooker for last 30 minutes of cook time. tip individual servings with sour cream.