Vegetarian Lasagne

• 250 g mushrooms, sliced
• 1.2 kg crushed or diced tomato
• 1 tbsp Italian herbs*
• 3 cloves garlic, crushed
• 700 g ricotta cheese
• 200 g frozen or fresh spinach. If frozen, thaw and break up if needed.
• 0.5 cup milk
• 250 g no boil pasta sheets
• 100 g mozzarella cheese
• 70 g parmesan cheese