Winter Squash Gratin

This is delicious--but I don't know whether to categorize it as a side or an entree or a breakfast/brunch dish. It's a cross between a souffle and a frittata, rich without being overbearing, delightful as a side or as a brunch dish or as a light main course accompanied by a green salad. I followed the recipe, using a butternut squash and herbs clipped from my deck garden (the waning days of it as the weather is getting colder). It's really very simple to put together. While the squash roasts, there's more than enough time to prep everything else. While the squash cools, the onions cook and then everything is thrown together to bake. I'm thinking it could be beautifully served by piling a micro green/arugula salad (light vinaigrette) in the middle of a plate, packing the warm grating into a ring and popping it atop the salad. A few cherry tomatoes and some crunchy croutons and Bob's your uncle.