Fill a pot halfway with water. Bring the water to a low simmer. Stir the vinegar into the water. While the water is heating, make the hollandaise.
Melt the butter over low heat in a small pot - do not let it boil. Then remove from the heat. Whisk in the egg yolks and half of the lemon juice. Return the pan to the heat, while whisking vigorously, until the sauce becomes very thick. Then remove from the heat immediately. Add more lemon juice if needed and season with salt and pepper taste. The sauce should be thick, buttery, lemony, and just lightly salty.
Make the latte: Heat the chai concentrate and milk in a saucepan. Simmer on low for 4-5 minutes, stirring occasionally.
Poach the eggs: Crack the eggs into a bowl. Gently place the eggs into the simmering water. You can poach multiple eggs at once, being careful not to overcrowd the pot. Cook the eggs in the water for 3-4 minutes. Remove the eggs with a slotted spoon. While the eggs are poaching, brown Canadian bacon and toast the English muffins.
Brown the Canadian bacon on both sides in a non-stick pan over medium heat.
Toast the English muffins in a toaster oven.
Finish the latte: Pour the heated chai latte into a French press or use a frother or whisk.
Place the lid on the French press and move the plunger up and down 20 times. Make sure to hold onto the lid as you move the plunger. The Chai latte will double in volume. Alternatively use a frother or whisk by hand until the latte doubles in volume. Pour the chai latte into a mug. Add sugar to taste if needed. Dust with cinnamon.
Serve: Top toasted English muffins with Canadian bacon and poached eggs, and spoon hollandaise sauce over the top. Enjoy with sliced pear and a latte.