Fill a medium saucepan with water, add the white vinegar, and bring to a gentle simmer over medium heat.
In a small heat-proof glass bowl, whisk the single egg yolk, Greek yogurt, and lemon juice until the mixture is completely smooth.
Melt the ghee and slowly drizzle it into the yolk mixture while whisking constantly over a double boiler until the sauce becomes thickened and velvety.
Season the clean hollandaise with a pinch of sea salt and keep it warm over the lowest heat setting.
Split and toast the whole wheat English muffin halves until they are golden brown and crisp.
In a non-stick skillet over medium heat, sear the Canadian bacon slices for approximately 2 minutes per side until heated through and slightly browned.
Crack the two large eggs into individual small ramekins, then gently slide them into the simmering water and poach for 3 minutes for a perfectly runny yolk.
Place two slices of Canadian bacon on each toasted muffin half, top each with a poached egg, and drizzle generously with the warm hollandaise.
Garnish the finished dish with black pepper, smoked paprika, and finely chopped fresh chives before serving immediately.