To make this Ginger Ground Beef Donburi Recipe gluten free, replace the soy sauce with certified gluten-free tamari or gluten-free soy sauce. Verify that the mirin, garlic powder, frozen peas, and any packaged ingredients are labeled gluten free. White rice is naturally gluten free, but check packaging for cross-contact warnings if necessary. Use clean cookware, utensils, and serving bowls to prevent cross-contact with gluten-containing foods.