1-lb. ground beef
1 small onion, chopped
2 tsp. chili powder
1/2 tsp. paprika
2 tbsp. Taco seasoning mix
1 1/2 tsp. Worcestershire sauce
1 (8-oz.) can tomato sauce
1/2 tsp. oregano
1/2 tsp. salt
10-12 taco shells
Shredded lettuce
Taco sauce, bottled

Brown ground beef and drain well. Place in crockpot, add remaining ingredients except taco shells, lettuce and taco sauce. Cover and cook on low for 8-12 hours. Fill taco shells with meat mixture, top with sauce, shredded lettuce and other toppings of your choice.