cheesy beef-spinach noodle casserole

Ingredients For cheesy beef-spinach noodle casserole

• 1 pkg

  (8 ounce) wide noodles, cooked
• 1-1/2 lb

  ground beef
• 1

  medium onion, chopped
• 1

  medium green pepper, seeded and chopped
• 2 Tbsp

  minced garlic
• 2 tsp

  italian seasoning
• 2-1/2 c

  grated parmesan cheese
• 1 c

  canned sliced mushrooms, drained
• salt and pepper
• 4-1/2 c

  spaghetti sauce
• 1 pkg

  (10 ounce) frozen chopped spinach, thawed and drained well
• 4 c

  grated monterey jack cheese
• 1-1/2 c

  sour cream
• 1

  large egg
• 2

  small green onions
• 1/2 tsp

  garlic powder