Sprinkle the avocado with the lime juice and mash together in the bowl.
In a separate bowl, mix the onion, tomato, cilantro and hot sauce. Stir into the avocado mixture and season to taste with salt.
Transfer to a serving bowl and serve or refrigerate, tightly covered for a few hours.
Preheat oven to 350 degrees. Place the tortillas on a cutting board. Brush the oil over both sides of the tortillas. Stack the tortillas and cut them in half, then cut the halves in half and one more time to make eighths. Spread the tortillas in one layer on a parchment-lined baking sheet and sprinkle with sea salt. Bake for 15-20 minutes or until crisp. Transfer to a paper towel-lined plate and cool.