Zucchini Lasagna

Ingredients

• 1 lb. lean ground beef
• 2 cloves garlic, minced
• 1 (15 oz.) can tomato sauce
• 1 tsp. salt
• 1 tsp. each: basil and oregano
• 1/2 tsp. each: thyme and marjoram
• 1 1/2 c. dry cottage cheese or low-fat Ricotta cheese
• 1/2 c. freshly grated Parmesan cheese
• 1 egg, lightly beaten
• 4 medium zucchini
• 1 c. shredded part-skim Mozzarella cheese