Garlic Chicken Pizza

• 2 garlic mashed (cloves)
• 1 pizza crust see note
• 1/2 onion in rings (red cut)
• 1/2 tomato (chopped)
• 140 gr boned
• 110 gr mozzarella cheese (shredded)
• 60 ml nonfat sour cream
• 110 ml cream cheese softened (light)
• 45 gr mushrooms (sliced)