This easy to make Cheddar and Onion Scottish Breakfast Sandwich with Egg, Ham, Spinach and Whole Grain Mustard is a perfect, Highland kind of morning meal.
Preheat the oven to 450 degrees F and line a baking sheet with parchment.
In a large bowl or the bowl of a food processor, mix flour, baking powder, sugar, and salt. Using a pastry blender, fork, or the metal blade of a food processor, cut in the butter until the mixture is crumbly. Stir in shredded cheese, green onions, and milk, just until the dry ingredients are moistened.
Drop dough onto parchment lined or ungreased baking sheet by 8 to 12 spoonfuls, about 2 inches apart. Brush with beaten egg, sprinkle with a dusting of freshly ground black pepper and bake 12 to 15 minutes or until golden brown.
Slice the biscuits in half and serve with ham, spinach or arugula, whole grain mustard and fried eggs.
Food Processor Tip: Using a food processor to cut in the butter makes this biscuit recipe quick and incredibly easy. Add the dry ingredients to the bowl of the processor and pulse a couple of times to mix. Then add the diced cold butter and pulse 3 to 4 times until evenly crumbly. Add the cheese and onions and pulse one more time. Then drizzle the milk through the feed tube and mix until the dough just comes together.