Cook the bacon in a large skillet over medium heat until crisp; place on paper towels to drain off the excess grease. Side Note: You can also roast the bacon.
Heat the tortilla over an open flame on your stove for a few seconds on each side, or in the microwave for 15 seconds to make it more pliable.
Spread some mayonnaise over the tortilla, then place the lettuce down the center, followed by the bacon, tomatoes, and avocado.