To make the eggs, preheat oven to 350 degrees. Grease two 15 x 10 rimmed baking sheet, then line them with a piece of parchment paper.

Add the eggs to a medium bowl. Beat the eggs until they are a pale yellow color. Add the onion, bell pepper, asparagus, and Cajun seasoning to the eggs. Mix well.

Pour the egg mixture into one of the baking sheets. Bake the eggs for 30 minutes or until the eggs are cooked through and starting to separate from the edges of the pan. Let the eggs sit for a couple minutes. Use a knife or pizza cutter to cut the eggs into 12 squares.

While the eggs are cooking, make the sausage by combining the pork, broth, and 2 tablespoons Cajun seasoning together in a medium bowl.

Spread the pork mixture out evenly on the baking sheet so that it touches all of the sides. Bake for 20 minutes. Remove the sausage from the oven let it sit for a few minutes. Brush off the excess oil with a pastry brush or blot it with a paper towel. Then use a knife or pizza cutter to cut the sausage into 12 squares.

To build the breakfast sandwiches, slice the croissants in half. Place one slice of cheddar, one square of sausage, and the one square of egg on the bottom of the croissant. Place the top of the croissant on top of the egg.