Preheat oven to 375°F.
Cut spaghetti squash in half and remove seeds. Place squash halves face down on a baking sheet lined with parchment paper. Bake for 35 minutes.
Remove from oven and let sit 5 minutes, then flip squash halves over and allow to cool completely. Do not attempt to string until completely cool.
Use a fork to create spaghetti like strands from the flesh of the squash. It is important not to refrigerate the squash before this step is done.
Place strung squash back into the skin.
Add desired amount of store bought organic sugar free Marinara sauce and top with desired amount of cheese. Bake for in a
pre-heated oven at 375 until cheese melts, about 10 minutes. Serve warm.