Tasty zucchini lasagna<!-- -->

Ingredients

• 1 lb (450 g) beef ground meat
• 2 garlic cloves
• 1 onion
• 1 tsp olive oil
• salt
• pepper
• 28 oz (800 g) crushed tomatoes
• 2 tbsp basil
• 1 tsp thyme
• 1 tsp rosemary
• 3 medium size zucchinis
• 15 oz (about 425 g) cottage cheese
• 16 oz (about 450 g) mozzarella cheese
• 60 g parmesan cheese
• 1 large egg