Preheat oven to 350F and grease an 8x8 pan.

In a bowl, whisk together eggs, milk, salt, and pepper. Pour into greased pan and bake for 20 minutes. Let cool 10 minutes then cut into 6 squares.

Meanwhile, form sausage into six patties, pressing down very flat as they will shrink up bigger when cooking.

Heat pan over medium-high heat and cook for about 4 minutes each side. Let cool.

Open english muffins and lay all the bottoms out. Add square of egg, sausage patty, and one slice of cheese to each muffin, then top with muffin top. Repeat until all sandwiches are made.

Lay a square of parchment paper on top of a square of aluminum foil and wrap each sandwich individually. Add to a large ziploc bag and seal.

When reheating, unwrap from parchment and aluminum and microwave for 2-3 minutes or until fully warmed through, or in toaster oven for 10-15 minutes at 400F.