Preheat the oven: I always let my daughter help press the oven buttons while I supervise. Preheat the oven to 400°F and line two baking sheets with parchment paper. Set aside so everything is ready when the fun starts.
Cook the sausage: In a large skillet, cook the breakfast sausage over medium heat until browned and crumbly. My little helper loves breaking it up with a wooden spoon. Transfer to a plate and set aside.
Scramble the eggs: Whisk the eggs with milk, salt, and pepper. Melt the butter in the same skillet, then gently scramble the eggs until just set. I always remind my daughter that soft eggs are the secret because they finish cooking in the oven.
Make the filling: In a bowl, gently fold together the scrambled eggs, cooked sausage, shredded cheddar cheese, and country gravy. Let the filling cool slightly so the pastry stays flaky.
Prepare the pastry: Roll out the puff pastry on a lightly floured surface and cut each sheet into 6 rectangles. This is where my daughter lines them up proudly like little breakfast tiles.
Fill and seal: Place filling in the center of half the pastry rectangles. Brush edges with egg wash, top with remaining pastry, and crimp edges with a fork. We always count the fork presses together to make sure nothing leaks.
Bake: Brush tops with egg wash, sprinkle with everything bagel seasoning, and cut small slits for steam. Bake for 20 to 25 minutes until golden and puffed.
Cool and enjoy: Let cool for 5 minutes before serving. This is the hardest step because the smell fills the kitchen and everyone wants to grab one right away.