Gluten free beef bulgogi

What haven’t I done before?┬áMade a Korean dish. Ingredients (serves 2): 300g Beef rump steak, sliced in chunks 5 x tbsp gluten free soy sauce 2 x tbsp brown sugar 1 x White onion, diced 2 x Garlic cloves, diced 2 x tbsp sesame oil 0.5 tsp ground black pepper Sesame seeds (which I forgot)…