Begin by cooking the spaghetti squash. This can be done in the instant pot, simply place the spaghetti squash on the rack inside the instant pot or in the pot. Add 1 cup of water, cover, and seal. Cook on high pressure for 7 minutes and then quickly release the steam.
Heat up a large skillet on medium-high heat. Add in the spinach until it wilts.
Scoop the strands of spaghetti squash out and place on a paper towel-lined plate along with the spinach. This will help get the water out of the squash and spinach.
In a food processor, chop together the squash and spinach until you get to a fine consistency.
Add that mixture to a large mixing bowl, mix in the breadcrumbs, cheese, garlic, pepper, and baking powder.
Whisk in the eggs into the mixture.
Create small patties with the spaghetti squash mixture about 3/4 inch thick. This should make about 10 patties.
Heat up the skillet to medium-high heat with 1 1/2 TSP olive oil.
Add the patties to the pan and cook for 3 minutes on each side until nicely warmed.