Preheat your oven to 350°. This temperature is ideal for roasting the squash to perfection.
Carefully cut the spaghetti squash in half lengthwise using a sharp knife. Be cautious, as the skin can be tough. Scoop out the seeds and fibrous strands with a spoon, creating a hollow space for the filling.
Place the squash halves cut side up on a baking sheet. To enhance the flavor, sprinkle generously with salt and fresh pepper. This will season the squash as it roasts.
Roast in the oven for about an hour. You’ll know it’s ready when the skin gives easily under pressure and the inside is tender. If you prefer the microwave, place the halved squash in a microwave-safe dish, cover, and microwave for 8 to 9 minutes.
While the squash is cooking, season the chicken cutlets with salt, pepper, garlic powder, and oregano. Make sure to coat both sides for maximum flavor.
Heat a grill pan or George Foreman grill over medium-high heat. Once hot, grill the seasoned chicken on both sides until cooked through, about 3 to 5 minutes. Remove the chicken from the grill and place it on a separate dish to rest.
After the squash is done roasting, carefully fluff the spaghetti-like strands with a fork while still keeping it in the shell. This will create the perfect texture for your filling.
Season the fluff with a little more salt and pepper to taste. Then, spoon about 1/4 cup of the warm marinara sauce into each squash boat, spreading it evenly.
Slice the grilled chicken on the diagonal into bite-sized pieces. Place the chicken slices on top of each squash half, making sure to distribute it evenly.
Top each piece of chicken with another 1/4 cup of the remaining marinara sauce. Finally, sprinkle a generous amount of mozzarella cheese on top of each boat.
Return the filled squash boats to the oven and bake for an additional 12 minutes, or until the cheese is melted and bubbly. The sight of golden, gooey cheese is absolutely irresistible!
Once done, remove from the oven and garnish with fresh basil. Serve hot, and consider offering some grated parmesan cheese on the side for those who like an extra cheesy touch.