Oven: Preheat your oven to 375 degrees F (190 degrees C). Place the pizza slices on a baking sheet lined with aluminum foil or parchment paper.
Bake for 5-10 minutes, or until the crust is crispy and the cheese is melted and bubbly.
Stovetop: Heat a cast-iron skillet or frying pan over medium heat. Add a teaspoon of olive oil to the pan, then place the pizza slice in the pan.
Cook for 2-3 minutes per side, or until the crust is crispy and the cheese is melted and bubbly.
Air Fryer: Preheat your air fryer to 400 degrees F (200 degrees C). Place the pizza slice in the air fryer basket and cook for 5-7 minutes, or until the crust is crispy and the cheese is melted and bubbly.
Don't reheat pizza in the microwave. The microwaves will make the crust soggy and the cheese rubbery.
Don't reheat pizza for more than 10-15 minutes. This will prevent the crust from burning and the cheese from drying out.