Fill a medium saucepan with water and add the white vinegar; bring to a gentle simmer over medium heat.
Prepare the hollandaise by whisking the single egg yolk, lemon juice, sea salt, and cayenne pepper in a small heat-proof bowl placed over a pot of simmering water (double boiler).
Slowly drizzle the melted ghee into the egg yolk mixture while whisking constantly until the sauce is thickened and emulsified, then remove from heat and keep warm.
In a small skillet over medium-high heat, sear the Canadian bacon slices for 1-2 minutes per side until lightly browned and heated through.
Split and toast the English muffin until golden brown.
Carefully crack the two remaining eggs into the simmering water and poach for 3 minutes until the whites are set but the yolks remain runny.
Place three slices of Canadian bacon on each toasted muffin half.
Use a slotted spoon to lift the poached eggs from the water, blot briefly on a paper towel, and place one egg on top of each bacon-covered muffin half.
Spoon the warm hollandaise sauce generously over the eggs and garnish with fresh chives and black pepper.