Zucchini Deep Dish Pie

2 tbsp butter
3 medium zucchini, washed and thinly sliced
½ lb feta cheese, crumbed
½ lb Swiss cheese, grated
3 cloves garlic, minced
4 ripe tomatoes, chopped
4 tbsp olive oil
Salt and pepper to taste
¾ c instant mashed potato flakes
Pie crust

Preheat oven to 350 degrees. Butter a large round deep-dish casserole. Cover the bottom of the pan with a third of the zucchini slices. Sprinkle a third of the crumbed feta cheese and a third of the grated Swiss cheese over the zucchini. Layer a third of the garlic, a third of the chopped tomatoes, oil and salt and pepper. Sprinkle with a third of the mashed potato flakes. Repeat the layers two more times until all the ingredients are used. Cover the entire dish with the pie crust. With a knife cut several slits in pie crust for venting. Bake for 1 hour and 15 minutes. Remove from oven and let cool slightly before cutting.