4 tsp oil
1 medium onion, coarsely chopped
1 lb ground beef
1 (15oz) container ricotta cheese
3 cups shredded mozzarella cheese
1 cup Parmesan cheese
2 garlic cloves, minced
3 cups pasta sauce
2 tbsp butter, cut into pieces
Heat skillet over medium heat. Add t tsp oil, onion and ground beef. Saute until meat browns and onion is translucent (about 5 minutes) Remove from heat and cool.
Brush 1 tsp oil over baking sheet. Cook manicotti in large pot of boiling water until slightly softened, but still very firm to the bite (4-6 minutes). Using a slotted spoon, transfer the manicotti from the pot to the oiled baking sheet and let cool.
Combine ricotta, 1 1/2 to 2 cups mozzarella cheese, 1/2 cup Parmesan cheese. Add garlic. Stir the cooled meat mixture into cheese mixture.
Preheat oven to 350 degrees. Brush oil over bottom of a baking dish.
Spoon 1 1/2 cups sauce over bottom of dish.
Fill manicotti with meat mixture. Arrange in single layer in dish and put the rest of the sauce over top. Sprinkle 1/2 cup mozzarella cheese over the top.
Bake uncovered until heated through, about 30 - 35 minutes.
Let stand 5 minutes before serving.