This delightful spaghetti squash casserole combines the comfort of cheesy goodness with the healthy twist of squash. It's perfect as a hearty side or a satisfying meatless main course.
Preheat your oven to 400°F. Lightly coat a 1.5-quart baking dish with the olive oil spray.
With a sharp knife, make a few holes in the spaghetti squash and microwave it for 6 minutes. Flip it to the other side and microwave for an additional 6 minutes until it feels soft. Let it rest for 5 minutes to finish up cooking.
Once cooled slightly, halve the squash lengthwise and scoop out the seeds. Use a fork to scrape the flesh into strands, and place them into a large bowl. Set this aside.
Combine for the Casserole:
In a separate bowl, whisk together the egg, sour cream, kosher salt, pepper, thyme, and minced garlic until smooth.
Now add the prepared spaghetti squash and the shredded cheddar cheese into the egg mixture. Stir everything until it is well combined.
Transfer this combined mixture into the prepared baking dish and bake for approximately 40 minutes or until the top is golden and bubbly.
After removing from the oven, let the casserole rest for 10 minutes. Then, serve by scooping onto plates or cutting into squares.