2. Beat eggs lightly with fork. Add the rice and stir gently but thoroughly.
3. Take 1 tablespoon of the mixture, place a cube of mozzarella in the middle and then top with another tablespoon of rice. Shape into a ball and roll in the breadcrumbs. Place on parchment-lined baking sheet. Repeat with the rest of the rice mixture.
4. Refrigerate pan of rice balls for at least 30 minutes.
5. Meanwhile, preheat oven to 425°F. Drizzle 2 tablespoons of olive oil over rice balls.
6. Bake in the preheated oven for 20 to 25 minutes, or until golden brown. Serve with warm marinara sauce.