Step 1

Place 4 slices of the bread on a large clean work surface.

Step 2

Layer 1/8 cup of cheese, 1/4 of the salmon, a pinch of the lemon zest and dill, and then another 1/8 of cheese on each slice of bread (basically dividing everything in 4 among the slices of bread), then top each with another slice of bread.

Step 3

Melt two tablespoons of the butter in a large skillet over medium heat. Add the sandwiches, two at a time, and cook until the cheese has melted and the bread is golden brown, about 3 minutes per side.

Step 4

Repeat for all of the sandwiches, adding more butter to the pan as needed.

Step 5

Cut in half and serve at once.