Preheat oven to 400 degrees. Cut spaghetti squash in half lengthwise and scoop out seeds. Brush olive oil, salt and pepper on each half. Put face down on foiled sheet (for easy clean up). Bake up to 45 minutes or until it easily "spaghettis" with a fork

Heat oil or butter in a pan. Add sliced mushrooms and cook. Add cut chicken and cook until no longer pink. Alternatively, bake chicken in the oven while the squash is cooking, about 20-30 minutes

Melt the butter in a saucepan on medium heat. Add the minced garlic and cook for 1 minute. Add the flour to the melted butter and use a whisk to mix. Add the milk and whisk, do not let it burn. Once the milk is heated and a little thicker, add the cheeses and whisk them in until melted. If too thin, add more flour. If too thick, add more milk