Potato, Mozzarella and Caramelised Onion Frittata

Ingredients

• 2 tbsp. olive oil
• 2 onions, chopped
• 1 tbsp. brown sugar
• 8 eggs
• 50 ml milk
• 1 2/3 (150 g) Perfect Italiano™ Mozzarella
• 1 garlic clove, crushed
• Salt and pepper, to taste
• 500 g potatoes, peeled and sliced