Weekday Lasagna

Ingredients (11)

• 1 pound lean ground beef (90% lean)
• 1 small onion, chopped
• 1 can (28 ounces) crushed tomatoes
• 1-3/4 cups water
• 1 can (6 ounces) tomato paste
• 1 envelope spaghetti sauce mix
• 1 large egg, lightly beaten
• 2 cups fat-free cottage cheese
• 2 tablespoons grated Parmesan cheese
• 6 uncooked lasagna noodles
• 1 cup shredded part-skim mozzarella cheese