Fill a medium saucepan with water and add the white vinegar; bring to a gentle simmer over medium heat.
In a small heat-proof glass bowl, whisk together the egg yolk, non-fat Greek yogurt, lemon juice, and melted ghee until smooth.
Place the bowl over the simmering water, ensuring the bottom does not touch the water, and whisk constantly for 3-5 minutes until the sauce thickens into a velvety consistency.
Remove the hollandaise sauce from the heat and stir in the sea salt, black pepper, and cayenne pepper; set aside in a warm spot.
In a separate non-stick skillet over medium-high heat, sear the Canadian bacon slices for about 2 minutes per side until they are heated through and slightly browned.
Toast the whole wheat English muffin half until it is golden and crisp.
Carefully crack the two eggs into the simmering vinegar water and poach for exactly 3 minutes until the whites are fully set but the yolks remain soft and runny.
Place the seared Canadian bacon onto the toasted English muffin half, then carefully lift the poached eggs with a slotted spoon and place them on top of the bacon.
Spoon the warm yogurt hollandaise over the eggs, garnish with freshly chopped chives, and serve immediately.