Name: Croque Madame McMuffins
Prep time: 15 min
Cook time: 15 min
Total time: 30 min
Yield: 4 sandwiches
Ingredients: 1 and 1/2 Tablespoons unsalted butter; 1 and 1/2 Tablespoons all-purpose flour; 1 cup whole milk; 8 ounces Gruyère cheese, coarsely grated; 2 ounces Parmesan cheese, finely grated; Salt and freshly ground black pepper, to taste; Pinch freshly grated nutmeg; 4 English muffins, cut in half and toasted; 4 Tablespoons Dijon mustard; 8 slices ham; 2 Tablespoons olive oil; 4 large eggs