Spaghetti Squash Au Gratin

1 medium spaghetti squash
2 tablespoons butter
1 small yellow onion, cut in half and very thinly sliced
¼ teaspoon red pepper flakes, or more if you like it spicy
1 teaspoon fresh thyme
½ cup sour cream
½ cup shredded cheddar cheese

Cut the spaghetti squash in half and remove the seeds.  Place in a covered dish with a ¼ inch of water and microwave for 10 -12 minutes.  In a medium sized skillet over medium heat, add the butter, onions, red pepper and thyme and cook until the onions are slightly brown in color.  Salt and pepper to taste. 

Using a fork, scrape the insides of the squash and transfer to a small bowl.  Combine the squash, onions, sour cream and half the cheese together and mix well.  Transfer the mixture to a buttered baking dish and top with remaining cheese.

Place into a 375º for 15 – 20 minutes until golden brown on top.

I made this to go along with our ham, scalloped potatoes and green bean casserole for Christmas!