Preheat oven to 400 degrees
Heat 1 tablespoon oil in skillet and cook onion and sausage until cooked through and onion is tender about 8-10 minutes
Add spinach, mushrooms, basil, salt and pepper.
Whisk 6 eggs and milk together and combine with sausage and veggies and pour into a buttered 9 by 13 baking dish.
Top with goat cheese.
Bake 20 minutes until cheese is melted and eggs are fluffy.