Do everything as mentioned in "How to Make a Simple Spaghetti Squash" (the only difference is that this time I placed the fresh garlic on before baking as well).
Place all red sauce ingredients in a small pan and cook it on low heat, stirring occasionally, until it's hot.
Once the spaghetti squash is done, place it in a bowl and top with the red sauce (and a protein if you want --> we added grilled chicken to ours).