In a small heat-safe bowl, whisk together the Greek yogurt, egg yolk, lemon juice, Dijon mustard, and melted ghee until smooth.
Place the bowl over a small pot of simmering water to create a double boiler, whisking constantly for 3-5 minutes until the sauce thickens into a velvety consistency, then season with sea salt and black pepper.
Fill a medium saucepan with water and the white vinegar, bringing it to a gentle simmer over medium heat.
Crack each egg into a small ramekin, then carefully slide them into the simmering water, poaching for 3 minutes until the whites are set but the yolks remain runny.
While the eggs poach, lightly sear the Canadian bacon in a skillet over medium heat until warmed through and toast the English muffin half.
Place the toasted English muffin on a plate, layer with the Canadian bacon slices, and carefully top with the poached eggs using a slotted spoon.
Drizzle the warm hollandaise sauce over the eggs and garnish with freshly minced chives before serving.