Campbell's Turkey Tetrazzini

• 30 mins
• 3 zucchini
• 1/2 baking dish
• 1/4 parmasan (grated)
• 210 gr turkey (cooked)
• 140 gr spaghetti (cooked)
• 120 ml milk
• 60 ml sour cream
• 32 gr dry
• 30 gr onion (finely chopped)