Cheesy Chicken Marinara

• 4 chicken breast (skinless boneless halves cut into)
• 2 garlic (cloves minced)
• 1 onion (chopped)
• 1/2 mushroom (sliced)
• 450 ml ja marinara sauce
• 450 gr box spaghetti
• 110 gr mozzarella cheese (shredded)
• 60 ml olive oil
• 20 gr parmesan cheese (grated)
• 3 gr parsley (chopped)