A delightful twist on the classic Croque Madame, featuring Dijon mustard and a creamy béchamel sauce for an elevated flavor.
Preheat your oven to 375°F (190°C).
Preheating ensures even cooking and a crispy texture.
Spread a thin layer of Dijon mustard on one side of each bread slice.
Use a butter knife for an even spread.
Place half of the bread slices mustard-side up on a griddle or skillet. Top each with grated Gruyere cheese and smoked ham.
Layer the cheese first to help it melt and hold the sandwich together.
Cover with the remaining bread slices, mustard-side down. Butter the outer sides of the sandwiches.
Butter the bread evenly for a golden crust.
Heat the griddle or skillet over medium heat and cook the sandwiches until golden brown on both sides, about 3 minutes per side.
Press gently with a spatula for even browning.
Transfer the sandwiches to the oven and bake for 5 minutes to melt the cheese completely.
Place sandwiches on a baking sheet for easy handling.
Meanwhile, melt butter in a skillet over medium heat and fry the eggs sunny-side up.
Cook the eggs to your preferred doneness.
Top each sandwich with a fried egg and serve immediately.
Garnish with fresh herbs for added flavor.