Enchilada Casserole

Ingredients

• 12 or 18 taco shells
• 3 Tbsp. flour
• 1/2 tsp. salt
• 1/4 tsp. paprika
• 1 1/2 c. milk
• 1 (10 oz.) can mild enchilada sauce
• 1 c. shredded Cheddar cheese
• 1/2 c. olives
• 4 oz. can mushrooms
• 1 lb. ground beef
• 1/2 c. chopped onion
• 1 (10 1/2 oz.) can refried beans
• 1 tomato, chopped