In a small bowl, whisk together maple syrup, Dijon mustard, mayonnaise, and a pinch of salt to make the maple mustard sauce. Set aside.

Cook the sausage patties or bacon in a skillet over medium heat until browned and crispy. Remove and set aside on paper towels to drain excess grease.

In a mixing bowl, whisk together eggs, milk or cream, salt, and black pepper. Melt butter in a non-stick skillet over medium heat. Pour in the egg mixture and cook, stirring gently, until light and fluffy.

Lightly toast the croissant halves in a toaster or oven until warm and slightly crispy.

Spread a generous layer of maple mustard sauce on the bottom half of each croissant. Top with a slice of cheese, cooked sausage or bacon, and a portion of scrambled eggs. Place the top half of the croissant over the filling.

If desired, place the assembled sandwiches in a warm oven for a few minutes to melt the cheese further.

Serve immediately alongside coffee, fresh fruit, or a smoothie. Enjoy!