• Preheat the oven to 180C/350F.

Cheese Sauce

• To make the cheese sauce, melt the butter in a small saucepan on medium heat. Add finely chopped onions and sauté them in the butter until they're translucent.
  1 medium onion, 1/4 cup butter
• Add the flour while stirring, followed by the milk. Make sure to keep stirring to avoid any lumps as the milk will start to thicken. Reduce the temperature to low and add the mustard powder and grated cheese. Once the cheese is melted, season the sauce with salt and pepper to taste.
  1/3 cup all-purpose flour, 1 cup milk, 1/2 tsp mustard powder, 3/4 cup edam cheese, salt & pepper
• To assemble the cheese rolls, roll each sandwich bread slice flat with a rolling pin to avoid them breaking.
  1 loaf white sandwich bread
• Spoon some of the cheese sauce onto each slice of bread and spread it out evenly with the back of the spoon. Add some grated cheese and roll up each slice of bread tightly.
  3/4 cup Edam cheese, 1/4 cup butter
• Place the rolls on a baking sheet, seam side down. Brush the cheese rolls with melted butter and bake them for 15 minutes until they're golden brown. Enjoy!