Preheat oven to 400 degrees. Melt butter in cast iron or oven proof skillet. Add onion slices and garlic and cook until golden brown. Add cream and ricotta; stir and simmer until bubbly and starting to thicken. Slowly stir in parmesan. Add zucchini and yellow squash, stirring to combine. Sprinkle with bacon and smoked Gouda. Top with salt and pepper. Bake at 400 degrees for 30 minutes or until cheese is golden brown on top. Serve immediately.