Preheat oven to 350°F. Grease a 9x13-inch baking pan with butter or cooking spray.
In a large bowl, whisk together eggs, milk, salt, and pepper. Pour into the prepared pan.
12 large eggs, 1/3 cup whole milk, 1 teaspoon fine sea salt, 1/4 teaspoon ground black pepper
Bake for 20-22 minutes, or until center of eggs is just barely set.
Allow the eggs to cool for 10 minutes, then cut into 8 to 12 pieces (see notes). You can either cut the eggs into squares or use a biscuit cutter that's approximately the same size as the English muffins.
Optional: While the eggs are cooling, toast the English muffins. Cook the sausage if raw or serving the sandwiches immediately.
8 to 12 English muffins, 8 to 12 precooked round sausage patties
Top 4-6 English muffin halves with the sausage, followed by the eggs and one slice of cheddar cheese. Top with the remaining English muffin halves.
8 to 12 slices cheddar cheese
Wrap each sandwich individually in wax paper or aluminum foil. You can optionally place them in a gallon freezer bag.
To reheat the sandwiches from frozen:
Unwrap the sandwiches and wrap loosely in a paper towel. Microwave for 1 minute on 50% power, then microwave for an additional minute on full power.
Alternately, you can reheat the sandwiches in a 350 degree F oven for approximately 10 minutes. This works well if you want to reheat multiple sandwiches at once.
Notes
The number of servings will depend on the size of your English muffins. You will get 8 sandwiches with Bays, or 12 with Thomas. I recommend Bays.
You can either use pre-cooked sausage (fresh or frozen) that’s similar in size to the English muffins, or you can purchase raw breakfast sausage, shape it to the correct size, and cook it on the stovetop before preparing the sandwiches. If shaping raw sausage, aim for approximately 3 ounce patties. They’ll shrink by about 1/3 while cooking, so shape them just slightly larger than the English muffins.
Nutrition information is calculated based on a yield of 8 sandwiches.