01 -
Preheat oven to 350°F (175°C) if you'd like to warm the assembled sandwiches.
02 -
In a bowl, whisk together the eggs, milk, salt, and pepper.
03 -
Heat butter in a skillet over medium heat. Add eggs and scramble until just set. Remove from heat.
04 -
Slice croissants in half and lightly toast them if desired.
05 -
Assemble each sandwich: bottom half of croissant, slice of cheese, scrambled eggs, cooked bacon or sausage, and any optional toppings.
06 -
Top with the other half of the croissant.
07 -
If desired, place assembled sandwiches on a baking sheet and warm in the oven for 5–7 minutes to melt the cheese and heat through.
08 -
Serve warm.