Butter, softened at room temperature
4 slices sourdough ot other bread
1 medium leek, white and pale green parts, very thinly sliced
2/3 cup grated white cheddar cheese
4 slices firm ripe tomato
2 tablespoons mayonnaise
Spread butter evenly on one side of each bread slice. Place two bread slices, butter-side down, in skillet. Top with leeks, some cheese, then tomato, and then a little more cheese. Spread mayonnaise on other bread slices. Place bread, mayonnaise-side down, on top. Cook until lightly browned, then flip and brown the other side.
Serves 2.
From fooddownunder.com.