Step 1

Arrange an oven rack 4 to 6 inches below the broiler, then set the oven to broil on high heat. Line a rimmed baking sheet with aluminum foil. Fit a wire rack inside the baking sheet. Grate 4 ounces sharp cheddar cheese on the large holes of a box grater (about 1 cup).

Step 2

Place 2 slices white sandwich bread on the rack. Broil until deep golden brown, about 2 minutes. Flip the bread and broil until the second side is deep golden brown, about 2 minutes more.

Step 3

Remove the baking sheet from oven. Meanwhile, lean the toasts against each other to stand upright on the rack for 2 minutes so they cool down slightly and crisp on both sides. (This yields a less-soggy base once the cheese is melted.)

Step 4

Lay the toasts flat on the rack. Divide the cheese onto the bread, making sure the edges are completely covered to prevent the crusts from burning (it may look like it is piled high, but it will melt down). Drizzle 2 teaspoons Worcestershire sauce onto each toast.

Step 5

Broil until the cheese is bubbly and deep golden-brown in spots, 2 to 4 minutes. If desired, add an additional dash of Worcestershire sauce. Let cool for 1 to 2 minutes before serving.