Ingredients
1 tbsp. butter
1 tbsp. all-purpose flour
2/3 c. whole milk
1/4 tsp. Pinch kosher salt
1/4 tsp. Freshly ground black pepper
1/4 c. shredded Gruyère
4 slices thick brioche or country bread
2 tbsp. butter, softened
2 tsp. whole grain Dijon mustard
1/2 c. Mornay sauce
6 thin slices ham
1 c. shredded Gruyère, divided
1 tbsp. butter
2 large eggs
Maldon, for sprinkling
Freshly ground black pepper
Preparation
Step 1Preheat oven to 350°. Make Mornay sauce: In a small saucepan over medium heat, melt butter. Add flour and stir until fragrant, 1 minute. Gradually whisk in milk and add salt, pepper, and nutmeg. Bring to a simmer, whisking constantly, and cook until sauce thickens, 2 minutes. Remove from heat and stir in Gruyère. Let cool 10 minutes.Step 2Assemble Croque Monsieurs: In a large ovenproof skillet over medium heat, toast bread on both sides until lightly golden. Spread half tablespoon butter on each slice, then flip over two slices and spread each with 1 teaspoon mustard and 1 tablespoon Mornay sauce. Top each mustard slice with 3 slices ham, ¼ cup Gruyère, and remaining bread slices. Evenly spread tops of each sandwich with 2 tablespoons sauce, and sprinkle with remaining Gruyère.Step 3Transfer skillet to oven and cook until cheese is melty and top is golden, 15 to 18 minutes.Step 4 In a nonstick skillet over medium-high heat, melt butter. Crack eggs into skillet and fry until whites are set, 3 minutes. Season with salt and pepper and top each sandwich with an egg.
This sandwich is a lot to handle, so pick a nice, sturdy thick piece of bread to hold everything together! Can’t get enough of sandwiches? We’ve got you covered.
