In an 8-inch casserole pan add the olive oil, marinara sauce and crumble some feta cheese on top.

Sprinkle with salt and pepper to taste, dried oregano, garlic powder, and onion powder.

Add the frozen spinach cubes and bake in an already heated oven at 350 F or 180 C degrees for about 20 minutes.

Finally, place the cooked pasta in the baked spinach and feta sauce and mix until everything is coated with the sauce.

Serve and enjoy.