"The term “panini” (pronounced pah-nee-nee) is Italian for roll or biscuit. Originally filled with layers of tomato, mozzarella and basil, the Mediterranean sandwich’s popularity has transformed it into a meal of endless ingredient possibilities."
1.In a medium bowl, combine olives, onion, garlic, basil, pepper flakes and vinegar. Place bread halves on a cutting board, cut-side-up, and spoon olive mixture onto bottom half of bread. Top with spinach, cheese and tomato. Top with other half of bread and press down lightly to adhere. Using a serrated knife, cut bread into 4 equal pieces.
2.Heat a large nonstick skillet over medium heat. Coat skillet with cooking spray, then add sandwiches. Add weight to sandwiches by covering them with a sheet of aluminum foil, then topping them with a dinner plate and a few bread plates. Cook for 1 1/2 to 2 minutes or until lightly golden on bottom. Remove plates and foil and flip sandwiches over. Again, place foil and plates on top of sandwiches and reduce heat to medium-low. Cook for 2 more minutes or until browned on bottom. Remove from heat and let stand, covered, for 2 minutes. (NOTE: This will allow sandwiches to continue heating throughout without drying out and over-browning.) Enjoy!