Preheat your oven to 375F
In a large skillet, warm your oil over medium heat. Add the spinach and cook for about 3-4 minutes until the leaves are wilted. Season with salt and pepper. Remove from heat and set aside
Place the thin pounded steaks on parchment paper or your cutting board
Season one side liberally and spread an even layer of either feta cheese or ricotta over the top
Cover with an even layer of your cooked spinach, and then add another layer of parmesan cheese
Roll up the steak from one end. Make sure that you keep pressing along the seam to ensure a tight seal
Lightly grease a baking dish, place the rolls, and season with more salt and pepper
Bake until cooked through to your desired doneness. If it’s your first time, use a meat thermometer to check the internal temperature
Serve warm, and enjoy!