Begin by grating approximately 2 cups of sharp Irish cheddar cheese into a mixing bowl. Next, finely chop a handful of gherkins to add a nice crunch and tang. Measure out 2 tablespoons of your favorite mustard.

In the mixing bowl, combine the grated Irish cheddar, mustard, and a dash of white vinegar for depth. Mix until smooth and creamy.

Preheat your oven broiler. Meanwhile, spread a thin layer of butter on one side of the bread slices. Toast the bread slices butter-side down in a hot skillet for about 2-3 minutes until golden brown.

Transfer the toasted bread to a baking sheet and spread the cheese mixture over each slice, ensuring even coverage.

Place the baking sheet under the broiler. Watch closely as the cheese bubbles and turns golden brown, which should take around 1-2 minutes.

Once the cheese is bubbling and golden, remove from the oven. Garnish with extra chopped gherkins or herbs and serve hot.