1: Place a medium nonstick pan over medium heat and arrange inside 4 mason jar lids (centers removed).
2: Lightly spray with cooking spray.
3: Very gently crack eggs into the centers of the lids and lightly whisk with a fork to break up the yolk.
4: Pour water around the lids and cover the pan.
5: Cook on low heat for about 3-4 minutes, or until the egg is just set.
6: Remove lid and top eggs with cheese if you like.
7: Cook until the cheese is slightly melted, about 1 minute more.
8: Gently flip the egg bun side without the cheese onto the plate.
9: Top with mashed avocado and cooked bacon.
10: Assemble as shown, and enjoy!