Slice the frozen pepperoni pizza into bite-sized chunks using a sharp knife on a cutting board.
Preheat a skillet over medium heat until hot and lightly greased with a small amount of oil or cooking spray.
Place the burger buns cut-side down in the skillet and toast for about 2 minutes until golden brown and crispy, then flip and toast the other side similarly.
Remove the buns from the skillet and set aside. In the same skillet, add the pizza chunks and spread them out evenly. Cook for 3-4 minutes until the cheese starts to melt and the pizza pieces are heated through, stirring occasionally to prevent sticking.
Optional: Place cheese slices or shredded cheese on top of the pizza mixture and cover the skillet for 1 minute until the cheese melts and becomes gooey.
2 pieces burger buns
Assemble the dish by spooning the cheesy pizza mixture onto the toasted buns. Top with the remaining bun halves, then serve immediately, showcasing the crispy buns with melted cheese and flavorful pizza chunks inside.