Cheesy Spinach & Garlic Sweet Potato Boats with Ricotta, Feta & Parmesan

1. Preheat the oven to 425°F (220°C).
2. Drizzle olive oil on the bottom of a large sheet pan, season with salt and place the sweet potatoes face down. Drizzle the tops with oil and season with salt. Place in the oven for about 20 minutes.
3. While the sweet potatoes roast, prepare the cheese mixture. Add crumbled feta, shredded Parmesan, shredded mozzarella, ricotta cheese, minced garlic, thawed and squeezed spinach, 1/4 tsp salt, onion powder, and 1/2 tsp pepper to a bowl and mix to combine.
4. Remove sweet potatoes from the oven, flip them and gently mash down the centers. Use a large spoon to spoon about 1/4 cup of the cheese mixture onto each sweet potato half.
5. Place them back in the oven for about 20-25 minutes, until just browned on the tops.
6. Top with chopped scallions and cracked pepper before serving.