Steak Croque Madame | TasteToronto

Name: Steak Croque Madame | TasteToronto
Ingredients: 10 ounces steak (cut of choice), cooked and rested; 4 slices sourdough bread; 4 slices Gruyère; 2 whole eggs; 2 cups arugula (optional); 2 tablespoons unsalted butter, softened; 2 teaspoons grainy Dijon mustard; Kosher salt, to taste; Fresh cracked black pepper, to taste; Preferred hot sauce (optional); 1 cup whole milk, warmed; 1 tablespoon unsalted butter; 1 tablespoon all-purpose flour; Pinch of freshly rasped nutmeg

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This decadent sandwich is a modification of the very classic French sandwich Croque Madame which also happens to be a modification of another sandw...