I've looked at many frittata recipes and most start cooking the eggs on the stove and transfer to the oven to broil. But, I don't think I have the right skillet for that. So, inspired by the Fava Bean and Mint Frittata in the Chocolate and Zucchini Cookbook, I baked mine in a cake pan. Here's what I did:
I got two frying pans going on the stove (for speed) with a little olive oil in each. In one pan I cooked thin slices of patty pan in a single layer seasoned with salt and pepper until tender and slightly brown flipping them once. I took about three batches to cook the rather large squash I had on hand. I layered the squash slices in the bottom of a greased 8-inch round cake pan. You could also use another type of summer squash like zucchini in place of the patty-pan, which is a bit unusual but very delicious.
In the second frying pan, I pan fried thin slices of nugget potato (about 150g) with salt and pepper until they were lightly browned and tender. I layered these over the squash in the cake pan. I also added about 1/8 of a yellow onion sauteed on top of the potatos and 3 squash blossoms also sauteed for a very short time.
In a bowl, I beat 2 eggs with 2 or 3 tablespoons of milk, some grated Parmesan, coarsely chopped basil and tarragon, salt and pepper. I poured the egg mixture over the veggies in the pan and popped it in the oven for 16 minutes until the egg was set and beginning to brown. I cut it into quarters and ate the whole thing with a nice sliced tomato.
Here's one splendiferous slice:

It was quite a special little supper for me and I'll probably make something similar again.