Preheat the oven to 350 and line a muffin tin (or grease it but mine stuck a bit to the pan). This recipe yields 7 mini frittatas
Heat olive oil over medium low heat then add in the thinly sliced onions and season with sea salt and fresh pepper. Cook the onions, stirring every so often until they are browned and caramelized, about 10 minutes
Stir in the spaghetti squash, remove from the heat and set aside
Whisk together the eggs then stir in the salsa. Add in the veggies and stir again
Pour the mixture into your prepared muffin tin and top with grated cheese