1 c. ricotta cheese
1 c. shredded mozzarella cheese
1/4 c. grated Parmesan cheese
1 egg, slightly beaten
1 (10 oz.) frozen chopped spinach, chopped & drained
1/2 tsp. dried oregano leaves (or 1/4 tsp. powder)
1 (15 oz.) jar spaghetti sauce
20 jumbo shell macaroni, cooked & drained

Cook spinach according to package directions, drain and cool. Boil macaroni shells in large pot until soft. In a medium mixing bowl, beat 1 egg. Add 3 cheeses, then add spinach and oregano.

Spread 1/2 of spaghetti sauce in 10 x 8 inch baking pan. Stuff shells with a large spoonful of cheese mixture and place in pan (opening side down). Spoon remaining sauce over shells. Cover with tin foil and bake at 350 degrees for 35 minutes.