Savory Parmesan French Toast with Hollandaise Sauce

Name: Savory Parmesan French Toast with Hollandaise Sauce
Cuisine: European, Mediterranean, French
Ingredients: 4 large eggs; 1/2 cup whole milk; 1/2 cup heavy cream; 1/2 cup grated Parmesan, plus more for garnish; 1/2 teaspoon dry mustard powder; 1/2 teaspoon hot sauce (I used Tabasco); freshly ground black pepper, to taste; 1 large garlic clove, crushed with the side of a knife; dash salt; medium-size loaf of good-quality bread, cut 1-inch thick; butter, for frying; flat-leaf parsley or chives, for garnish; 3 egg yolks; 1/4 teaspoon dijon mustard; 1 tablespoon lemon juice; 1 dash hot sauce; 1/2 cup butter