In a griddle or frying pan, over medium heat, cook eggs over-easy.
Preheat oven to broil.
Cut croissants, and place the top and bottom of each croissant center-side up on a baking sheet.
Top the bottom of each croissant with two eggs, 3 strips of bacon, 1/4 the avocado slices, and one slice of cheddar cheese.
Broil the open-faced sandwiches, as well as the tops of each croissant, for 1-2 minutes until cheese is melted and the croissant starts to crisp slightly.
Remove from the oven, place the top of each croissant on each bottom, and serve warm.