Heat the oil in a skillet over medium-low heat. Add the egg(s) and cook using your preferred method (sunny side up, scrambled, or any style you like). Transfer the eggs to a plate and set aside. Wipe skillet clean.

Add the salsa to the same skillet and bring to a simmer. Stir in the tortilla chips, gently turning them to coat evenly in the salsa. Cook for 2–3 minutes more, until the chips have absorbed most of the liquid.

Top the chips with the cooked egg(s) and feta, then serve.