The leftovers are excellent, and you can quickly reheat them in the microwave. This casserole is cheesy, delicious, and easy to make. I started making it whenever I had leftover baked spaghetti squash or microwave spaghetti squash. But it’s so good, I now make it whenever I get the chance. You can make it as written or add mix-ins and turn it into a complete meal. The possibilities are endless!

Instructions

Storing Leftovers

Recipe Card

Spaghetti squash: I use a 3-pound squash in this recipe. Egg: I use large eggs in most of my recipes, this one included. Sour cream: Please use full-fat sour cream. Minced garlic: Mince it yourself, or use the stuff that comes in a jar. To season: Kosher salt, black pepper, and dried thyme. Shredded sharp cheddar: Extra-sharp cheddar is even better. It’s more flavorful.

Your first step is to cook the squash. I usually microwave it, but you can also bake it in the oven. Scoop out the pulp and seeds, and rake a fork back and forth to remove strands of the flesh into a bowl. Whisk an egg, sour cream, and spices in a bowl. Add the squash strands and shredded cheese and mix until uniform. Let the casserole rest, then cut it into four squares and serve. Here is the casserole served on a plate after it was cut into squares:

You Can Double This Recipe

When I serve this recipe to a larger group, I double this recipe and bake it in a 3.5-quart baking dish (such as a 9 X 13 baking dish) or Dutch oven, as shown in the photo below: If you double the recipe, you can microwave the two squashes at the same time. Microwave them for six minutes on the first side, six more minutes on the second, and then flip them again and microwave for six more minutes or until they are soft: I usually serve it as a side dish. And since I bake it in a 400°F oven, I like to serve it with a main dish that I can cook in the same oven, such as:

Pork meatballs Baked chicken thighs Keto tuna casserole Buffalo chicken Jerk chicken Baked chicken drumsticks Keto ground beef casserole

You can also freeze this casserole. Allow it to cool completely, then wrap it in a plastic wrap layer and then foil. It can be frozen for up to three months.

Spaghetti Squash Casserole - 1Spaghetti Squash Casserole - 88Spaghetti Squash Casserole - 58Spaghetti Squash Casserole - 57Spaghetti Squash Casserole - 18Spaghetti Squash Casserole - 58Spaghetti Squash Casserole - 8Spaghetti Squash Casserole - 44Spaghetti Squash Casserole - 36Spaghetti Squash Casserole - 64Spaghetti Squash Casserole - 17Spaghetti Squash Casserole - 46Spaghetti Squash Casserole - 72Spaghetti Squash Casserole - 45Spaghetti Squash Casserole - 64Spaghetti Squash Casserole - 31Spaghetti Squash Casserole - 25Spaghetti Squash Casserole - 68Spaghetti Squash Casserole - 49Spaghetti Squash Casserole - 8Spaghetti Squash Casserole - 88Spaghetti Squash Casserole - 21Spaghetti Squash Casserole - 92Spaghetti Squash Casserole - 77