Gluten Free Vegetable Tempura and Marinated Tuna

My dad made a trip to see us for Christmas this year. He is partial to Asian food, so we made sushi for Christmas. He mentioned tempura and suddenly, I really had to have some! My little sushi cookbook does not have a recipe for homemade tempura (it tells you to buy a package of the stuff, none of which are gluten free), but I found a promising candidate here at Chief Family Officer. I halved