Cut spaghetti squash in half and seed. Cook spaghetti squash in Instant Pot on Manual for 8 min. Alternatively cook in oven for 35 min.
Once cooked use a fork to dig out the squash and put in colander. Let drain. You can squeeze out the spaghetti squash by layering plastic wrap on top and pushing out the liquid.
Transfer the squash to a bowl and mix in remaining ingredients.
Divide the mixture into two to make two medium sized pizzas about 12" or into 4 to make 6" pizzas.
Spray parchment paper with oil and place pizzas on top.
Bake for 30 minutes or until golden. The smaller circles will be quicker.
If you would like a crispier crust, bake for 15 min on a baking sheet with parchment paper and then transfer to rack for another 10 min.
Top with your favorite ingredients and cook and additional 5 minutes. Enjoy!