Fill a medium saucepan with water and add the white vinegar; bring to a gentle simmer over medium heat.
In a small heat-proof bowl, whisk the single egg yolk, Greek yogurt, lemon juice, sea salt, black pepper, and cayenne pepper until completely smooth.
Place the bowl over a pot of barely simmering water to create a double boiler, then slowly whisk in the ghee until the sauce becomes velvety and slightly thickened.
Crack each of the two large eggs into individual small ramekins, create a gentle whirlpool in the simmering vinegar water, and carefully drop the eggs in to poach for 3 to 4 minutes.
While the eggs are poaching, lightly sear the Canadian bacon in a non-stick skillet over medium heat until warmed through and slightly crisp on the edges.
Split and toast the sprouted grain English muffin halves until they are golden brown and firm.
Place the toasted muffin halves on a plate, topping each with two ounces of the seared Canadian bacon and one poached egg.
Drizzle the warm, lightened hollandaise sauce generously over the eggs and garnish with freshly snipped chives before serving immediately.