Preheat the oven to 400┬░ F.
Lay the bacon on a baking sheet lined with parchment and bake for 15 minutes, until crispy. Transfer the bacon to a plate lined with paper towels and let it drain for a couple of minutes.
Break or cut the avocados into chunks and arrange on a platter. Drizzle with the lemon juice and olive oil. Sprinkle with salt and pepper. Scatter the watercress over the avocado and top with bacon.
Edited: October 15th, 2009