Scoop out the flesh of 4 hass avocados into a bowl and smash with a fork. Add 1/2 cup pico de gallo (recipe below), 1 tablespoon extra-virgin olive oil, 1 teaspoon kosher salt and 3 or 4 grinds of pepper; stir well. Cover with plastic wrap touching the surface (to prevent the top from turning brown) until ready to serve. This is best eaten soon after making it, but you can refrigerate it overnight if necessary.
Pico De Gallo: In a medium bowl, combine 4 diced plum tomatoes, 2 tablespoons chopped cilantro, 1/2 minced red onion, 1 minced garlic clove, 1 minced jalapeño (seeded), the juice of 1 lime, 1 teaspoon fresh celery juice (optional), 1/2 teaspoon kosher salt and a few grinds of pepper; mix well. Cover and refrigerate to allow the flavors to meld, 1 hour or up to 3 days. Drain any excess liquid before serving.