Brown meat in a large skillet over med-high heat. Dash salt and pepper over meat. After meat has been cooking for about 2-3 minutes, add scallion and garlic.
Meanwhile, you may want to pop the squash in the microwave for about 3-5 minutes depending on how large your squash is. I did not take this step, but you may want to, to soften the squash up a bit.
Once meat is almost fully cooked, add tomatoes, seasoning salt and spinach. Stir to combine and continue to cook until spinach is wilted. This should only take a couple of minutes.
Use a slotted (this will help drain excess liquid) spoon to spoon the turkey mixture into the squash halves. Fill them as full as possible. You may have extra turkey mixture; which makes a very tasty salad topping.
Bake stuffed squash at 400 degrees F. for 20 to 30 minutes, until tops are browned and squash is soft.
Enjoy!
Notes
Leftovers are great so don't be afraid to make the full recipe even if you will only serve half at one meal.