32 oz. Nachips, crushed
8 oz. cooked ground beef with taco seasoning
8 oz. pinto beans, drained
4 oz. grated Cheddar cheese
1/2 c. chopped onion
1 can El Paso tomatoes and chilies
1 c. plain yogurt
1 c. chopped mushrooms
Salt and pepper to taste

Line baking dish with 1/2 cup Nachips. Add all remaining ingredients, except cheese and Nachips. Now top with cheese and Nachips. Bake 20 to 30 minutes. Serve hot.