Preheat the oven to 375° F.
Spray a 9×13 baking dish with cooking spray of choice (I use avocado oil cooking spray).
Crack eggs and whisk together.
Sauté spinach for 2-3 minutes over medium heat until almost wilted. Add in the diced fire-roasted peppers and cook for an additional 3 minutes. Transfer veggies to a bowl and allow to cool for 5 minutes.
Using a slotted spoon, spoon veggie mixture into the egg mixture and pour into the oiled 9×13 baking dish.
Place baking dish in oven and bake for 20-25 minutes or until inserted knife comes out clean.
Remove baked eggs from oven and allow to cool for 5-10 minutes.
Once the eggs have cooled, use a cookie cutter that matches the size of the English muffin to cut the eggs. If you don’t have a cookie cutter, you can use the opening of a mason jar.
Place a piece of parchment paper on the counter and place English muffin bottom on top. Place the egg on the bottom layer, followed by the sausage patty, a slice of cheese (if desired), and top with the English muffin top.
Wrap tightly in wax paper and tape together.
Set wrapped sandwich aside and repeat with remaining English muffins, eggs, sausage and cheese.
Place wrapped sandwiches in a tightly sealed freezer-safe bag and place in the freezer.
To reheat sandwich, remove one sandwich from the freezer bag and remove wax paper. Wrap a moist paper towel around the sandwich and microwave for 1 minute. Remove from microwave, carefully separate egg and sausage then microwave open faced for 1 more minute. Let cool 1-2 minutes then remove from the microwave and enjoy!