Fried Risotto Balls Recipe - Jule's Tomato Sauce

Ingredients

• 1 tablespoon unsalted butter
• 1 tablespoon extra virgin olive oil
• 1 onion, finely diced
• 1 ½ cups Arborio rice
• 1 cup dry white wine
• 4 cups stock (vegetable or chicken), heated
• 1 teaspoon saffron threads
• 1 cup freshly grated Parmesan cheese
• Salt and pepper
• 4 ounces mozzarella cheese, cut into small cubes
• 3 eggs
• 1 cup breadcrumbs
• Vegetable oil for frying