Season the sirloin steak with salt and pepper. Heat a skillet over medium-high heat and cook the steak for about 4-5 minutes on each side for medium-rare. Let it rest before slicing.

In a saucepan, whisk together egg yolks and lemon juice over low heat until the mixture thickens. Gradually whisk in melted butter until smooth. Season with salt and cayenne pepper.

Bring a pot of water to a gentle simmer. Crack each egg into a small bowl and gently slide them into the water. Poach for about 3-4 minutes until the whites are set but yolks are still runny. Use a slotted spoon to remove.

On each toasted English muffin half, place a slice of steak, top with a poached egg, and drizzle with hollandaise sauce. Garnish with chopped chives.