Philly Cheesesteak Burgers – Lodge Cast Iron

Ingredients

• 1 pound ground beef, preferably 85% lean
• 1 teaspoon coarse kosher salt
• ½ teaspoon ground pepper
• 1 tablespoon extra-virgin olive oil
• ½ medium onion, sliced
• ½ sweet bell pepper, sliced
• 4 ounces Cabot Extra Sharp Cheddar, cut into 12 slices
• 4 hamburger buns, toasted if desired