Prep Your Ingredients: Finely chop the red pepper, and red onion. Thinly slice your tomato, and slice the cheese into approximately 2 oz slices. Use about 3 thin slices.
Layer your panini: Add the slices of cheese, followed by the the red peppers, red onion, sliced tomato, and olives. You can add as much as you like! Sprinkle with salt, pepper, oregano, and red pepper flakes.
Grill Your Sandwich: Transfer your sandwich to a warmed panini press. If you do not have a panini press, you can grill the sandwich in a non-stick pan sprayed with cooking spray.
Cut in Half and Serve Warm! After the sandwiches are done, remove them from the panini press and let them cool for about 3-5 minutes. Then cut in half and serve.