Ham-and-Cheddar Scallion Biscuit Sandwiches

In a large bowl, whisk the flour with the sugar, salt, baking powder and baking soda. Pinch the butter into the dry ingredients to form pea-size clumps. Stir in the buttermilk, scallions and the beaten egg just until a dry, shaggy dough forms. Turn the dough out onto a lightly floured work surface and knead gently just until it comes together. Pat the dough out to a 1/2 -inch-thick rectangle. Using a 4-inch round cookie cutter, stamp out 6 biscuits. Gently press the scraps together and stamp out 2 more biscuits. Arrange the biscuits on a parchment paper–lined baking sheet and freeze for 30 minutes.

将烤箱预热至375°。烘烤饼干约20分钟，直到金黄色。稍微冷却，然后将其分成一半，将一半切成一侧的烤盘上。用1个切达干酪切片和1个火腿切片覆盖每个饼干一半。烘烤，直到奶酪融化，大约8分钟。

In a large nonstick skillet, heat the canola oil. Crack 4 eggs into the skillet and cook sunny side up over moderately high heat until the whites are set and the yolks are runny, 2 to 3 minutes. Set the fried eggs on 4 of the biscuit bottoms and keep warm while you fry the remaining eggs. Close the sandwiches and serve immediately.