Cook the bacon in a skillet over medium heat until crispy. Remove and place on paper towels to drain; set aside.
In the same skillet, melt 1 tablespoon of butter. Crack the eggs into the pan and cook to desired doneness (sunny-side up or scrambled), seasoning with salt and pepper.
Toast the croissants lightly if desired. Layer each half with a slice of cheese, a cooked egg, and 2 pieces of bacon. Add optional arugula or tomato if using.
Serve immediately while warm and enjoy your Croissant Breakfast Sandwich!
Notes
Perfect for a weekend brunch or quick weekday breakfast. Customize with your favorite cheese or add avocado for extra richness.