Set a nonstick skillet on medium-high heat. Once hot, add the bacon and cook until it is seared on both sides, about 5 minutes total. Then remove.
Slice the buns in half. Lightly spray with olive oil. Add the buns face down in the skillet. Toast for 3 – 5 minutes or until the edges have lightly browned.
Alternatively, set oven to 350F/177C. Slice the buns open and spray with oil. Then place them in a baking tray face up. Place in the oven and toast for 3 – 5 minutes or until browned/toa¬¬sted to your liking.
In a bowl lightly whisk egg whites using a fork with the seasonings. Set nonstick skillet back on the heat for medium-high.
Wipe the skillet clean if needed, lightly spray with oil then pour in the egg whites clean. Using a silicone or wooden spatula pull the egg whites from side to side to scramble them. When the eggs are about 75% cooked, take the skillet off the heat and continue scrambling in the skillet using a spatula.
Bring it all together and build the sliders! Spread ripe avocado on the top and bottom insides of the bun. Add the egg whites then the slice of Canadian bacon.