Arancini with Le Gruyère AOP

Ingredients

• 1 onion
• 1 tomatoes
• 1 garlic cloves
• 50 ml olive oil
• 200 g risotto rice
• 100 ml white wine
• 150 ml of sherry
• 300 ml vegetable stock
• 40 ml cream
• 40 g butter
• 330 g Le Gruyère AOP
• 100 g flour
• 100 g breadcrumbs
• 50 g egg
• 1000 ml of frying oil