Fish Steak

16 minutes **6** **ingredients** Gluten free • Serves 4 **Seafood** 1 lbs Mackerel/tuna, cut steak **Produce** 1 Onion **Condiments** 2 tbsp Lemon juice 3/4 cup Soy sauce **Baking & spices** 1/2 tsp Pepper **Oils & vinegars** 3 tbsp Oil