Easier Eggs Benedict with Foolproof Hollandaise

Name: Easier Eggs Benedict with Foolproof Hollandaise
Yield: Serves 4
Ingredients: 8 tablespoons, unsalted butter, cut into 8 pieces and softened; 4 , large egg yolks; 1/3 cup boiling, water; 2 teaspoons, lemon juice; , Salt; Pinch, cayenne pepper; 4 , English muffins, split; 8 slices, Canadian bacon; 2 tablespoons, distilled white vinegar; 1 teaspoon, salt; 8 , large eggs