Tian de Boeuf aux Légumes
(adapted from Mireille Johnston's The Cuisine of the Sun)

1 pound mushrooms, sliced
6 cloves garlic, minced
6 shallots, minced
1/2 cup fresh bread crumbs
1/2 cup chopped parsley
Salt and freshly ground black pepper
8 to 10 slices cooked beef, or 3 cups chopped (use what you have -- exact proportions are not essential)
1/2 cup dry white wine
1 tablespoon olive oil

Preheat oven to 375°F. In a bowl, mix the mushrooms, garlic, shallots, half of the bread crumbs, parsley, salt and pepper. Oil a large baking dish and spread half of the vegetable mixture on it, lay the meat on it, and cover with the rest of the vegetables. Add the wine. Sprinkle with the remaining the bread crumbs and the olive oil and bake 30 minutes. Yield: 6 servings.

I can easily imagine adding another layer of leftover vegetables to this, or even mashed potatoes.

I'm on vacation, blogging may be light.