1/2 lb. ground beef
1/4 c. minced onion
1/4 c. bread crumbs
1/2 pkg. frozen spinach, thawed
1/4 c. grated Parmesan cheese
2 eggs, slightly beaten
1 tsp. salt
1/4 tsp. pepper

Brown beef with onion. Drain off excess fat. Blend together meat, spinach and remaining ingredients. Fill shells (uncooked). Cover bottom of 2-quart baking dish with 1 cup sauce. Any leftover filling can be blended with sauce. Arrange in baking dish in single layer. Leave space between each for expansion during baking. Completely cover with sauce. Cover dish with foil and bake at 375 degrees for 1 hour or cover dish with wax paper and microwave for 30 minutes, turning once.