Making steak pinwheels is an easy process with clear steps to follow. Here’s how to prepare them:

1. Prepare the Steak: Place the flank or sirloin steak between two sheets of plastic wrap. Use a meat mallet to pound it to about ½ inch thickness. This will ensure even cooking and tenderness.
2. Season the Steak: Remove the plastic wrap and season both sides of the steak with salt, pepper, garlic powder, and onion powder.
3. Make the Filling: In a bowl, combine the softened cream cheese, chopped spinach, and shredded mozzarella. Mix thoroughly until it forms a spreadable consistency.
4. Spread the Filling: Spread the cheese and spinach mixture evenly over the surface of the steak, leaving a small border around the edges.
5. Add Optional Ingredients: If using additional fillings like sun-dried tomatoes or herbs, sprinkle them evenly over the cream cheese layer.
6. Roll the Steak: Starting from one end, carefully roll the steak tightly to ensure the filling stays inside. Tuck in the sides as you roll for a neat finish.
7. Secure the Roll: Use kitchen twine to tie the roll at intervals, or secure with toothpicks to hold the shape.
8. Sear the Pinwheels: Heat olive oil in a skillet over medium-high heat. Sear the steak roll on all sides for about 2-3 minutes until golden brown.
9. Cook Through: Transfer the seared roll to a baking dish. Cook in a preheated oven at 375°F (190°C) for an additional 10-15 minutes, or until it reaches your desired level of doneness. Use a meat thermometer for precision (135°F for medium-rare).
10. Slice and Serve: Allow the steak pinwheels to rest for 5 minutes before slicing them into 1-inch thick pieces. This helps keep the juices locked in.

Following these steps will help you prepare steak pinwheels that are both delicious and visually appealing!