Fill a medium saucepan with water and add white vinegar; bring to a gentle simmer.
In a small bowl, whisk together Greek yogurt, lemon juice, Dijon mustard, turmeric, sea salt, and black pepper until smooth to create the hollandaise.
Gently warm the hollandaise in a small pot over very low heat, being careful not to boil or curdle the yogurt.
Lightly sear the Canadian bacon in a non-stick skillet over medium heat until golden brown on both sides.
Toast the English muffin halves until crisp and place the baby spinach on top to wilt slightly from the heat.
Crack each egg into a small ramekin, then carefully slide them into the simmering water; poach for 3 minutes until whites are set but yolks remain runny.
Layer the Canadian bacon on the muffin halves, top with the poached eggs, and generously drizzle with the warm yogurt hollandaise.