One Bento, Cakes, Side dish, and Snack recipe with Arugula, Champignons, Crème Fraîche, Cucumber, Dried onion, Egg whites, Mirin, Smoked salmon, Strawberry jam, Sweet potato, and Tomato made by Baking for Gluten-free, No eggs, and No wheat diet

Cheese and mushroom casserole with chicken

This casserole is simple and delicious, and makes a perfect snack during a picnic (bento anyone?)—you should use it as a basic idea for a casserole, since the pasta sauce is the stable and the most important piece of the meal. It's also a very tweak-able recipe! :-)