Preheat a small skillet over low heat.
Spread mayonnaise over one side of each piece of bread and place mayonnaise side down in the skillet
Top with cheddar cheese slices, black pepper to taste and remaining slice of bread, mayonnaise side out.
Grill until golden, about 4-5 minutes. Flip and grill the other side until golden.
Serve the grilled cheese sandwich.
