Toast the split whole wheat English muffin until golden and crisp.
In a small skillet over medium heat, lightly sear the Canadian bacon slices for 1-2 minutes per side.
Fill a medium saucepan with water and add the vinegar; bring to a gentle simmer.
Crack one egg into a small ramekin, swirl the simmering water to create a vortex, and gently slide the egg into the center.
Poach the eggs for 3 minutes until the whites are set but the yolks remain runny, then remove with a slotted spoon.
For the hollandaise, whisk the egg yolk and lemon juice in a heatproof bowl over a pot of simmering water until thickened.
Slowly drizzle in the melted ghee while whisking constantly until the sauce becomes velvety and emulsified.
Season the sauce with sea salt, black pepper, and a pinch of cayenne.
Assemble by placing Canadian bacon on each muffin half, topping with a poached egg, and spooning over the warm hollandaise.
Garnish with fresh chives and serve immediately.