Take butterflied flank steak and season both sides with salt and pepper to taste. Spread garlic across the flank steak. Next add a layer of spinach across the steak, followed by a layer of cheese.
Roll up the flank steak from the bottom. Secure with kitchen twine so that it does not unroll. Skewer the flank steak with toothpicks 2 inches apart. Slice flank steak into pinwheels.
Preheat oven to 350
Heat a cast iron on medium-high heat. Add 2 tbsp of olive oil to the pan and sear the pinwheels for 3 minutes per a side.
Place skillet with flank steaks into the oven and cook for 8-10 minutes. Remove from oven and tent with aluminum foil to cool. Remove twine and toothpicks, then enjoy!