Welsh Rarebit Crostini

Preheat oven to 180°C (350°F). Arrange baguette slices on a baking sheet.

Bake baguette slices for 5-7 minutes, or until lightly golden and crispy. Set aside to cool slightly.

In a small saucepan, melt the butter over medium heat. Whisk in the flour and cook for 1 minute, stirring constantly to form a roux.

Gradually whisk in the milk, ensuring no lumps form. Cook until the sauce thickens, about 2-3 minutes.

Remove the saucepan from the heat. Stir in the grated cheddar cheese, Worcestershire sauce, English mustard, cayenne pepper (if using), salt, and pepper until the cheese is melted and the mixture is smooth.

Spoon the cheese mixture generously onto each toasted baguette slice.

Return the crostini to the baking sheet and bake in the preheated oven for 8-10 minutes, or until the cheese is bubbly and golden brown.

Let the crostini cool slightly before serving.