Ingredients

• 8 ounces mostaccioli pasta
• 1 pound lean ground beef
• 1 onion, chopped
• 1 (4 ounce) can mushrooms, drained
• 1 (28 ounce) jar spaghetti sauce
• 2 cups shredded mozzarella cheese

Instructions

1. Bring a large pot of lightly salted boil water to a boil. Cook mostaccioli pasta in boiling water for 8 to 10 minutes, or until al dente. Drain well.
2. Meanwhile, cook ground beef and chopped onions in a skillet over medium heat until browned.
3. In a large bowl, mix together the mushrooms, spaghetti sauce, shredded mozzarella cheese, pasta, and browned ground beef and onion mixture. Transfer to a greased, 9x13 inch casserole dish.
4. Bake at 325 degrees F (165 degrees C) for 20 minutes, or until very hot.