4 egg yolks
1 tablespoon freshly squeezed lemon juice
1/2 cup unsalted butter, melted (1 stick)
Vigorously whisk the egg yolks and lemon juice together in a stainless steel bowl and until the mixture is thickened and doubled in volume.
Place the bowl over a saucepan containing barely simmering water (or use a double boiler,) the water should not touch the bottom of the bowl. Continue to whisk rapidly. Be careful not to let the eggs get too hot or they will scramble. Slowly drizzle in the melted butter and continue to whisk until the sauce is thickened and doubled in volume.Remove from heat, whisk in cayenne and salt. Cover and place in a warm spot until ready to use. If the sauce gets too thick, whisk in a few drops of warm water before serving.
For Eggs Benedict:
1/2 cup distilled vinegar, divided
12 large eggs
12 slices Canadian bacon
6 English muffins, split
Pour enough water into a skillet to reach a depth of about 3 inches, and add the vinegar. Bring skillet to a gentle simmer over medium heat. Crack an egg into a cup and carefully slide it into the hot poaching liquid. Quickly repeat with all the eggs. Poach the eggs, turning them occasionally with a spoon, until the whites are firm, or to the desired degree of doneness, about 3 to 5 minutes. Using a slotted spoon, remove the eggs and transfer to a kitchen towel. Lightly dab the eggs with the towel to remove any excess water.
While the eggs are poaching, heat the bacon or ham in a skillet or microwave until warm.
To serve, toast the English muffin halves and divide them among plates. Top each half with a slice of Canadian bacon, and set an egg on top. Spoon the hollandaise sauce over the eggs and garnish with the chives. Serve immediately.