01 -
In a skillet over medium heat, sauté ground beef until browned and fully cooked. Season with salt and black pepper to taste. Drain excess fat and set aside.
02 -
Spread softened butter evenly on one side of each bread slice.
03 -
Place the bread slices buttered side down on a clean work surface.
04 -
Evenly distribute shredded cheese atop two bread slices.
05 -
Top the cheese with cooked ground beef, diced tomatoes, onions, and bell peppers if desired.
06 -
Cover with the remaining bread slices, buttered side facing up.
07 -
Heat a skillet or griddle to medium. Grill sandwiches for 3 to 4 minutes per side until golden brown and cheese is melted.
08 -
Remove sandwiches from heat; let rest for one minute before slicing. Serve warm.