Hard-boil the eggs, cool them in an ice bath, then peel. Chop them to your preferred texture—chunky for a heartier bite or smaller pieces for a smoother salad.
In a bowl, add cottage cheese, mustard, lemon juice, salt, and black pepper. Stir well to combine. If you want it extra smooth and “classic egg-salad creamy,” mash the cottage cheese slightly with a fork before mixing.
Add the chopped eggs, celery, and onion. Gently fold until everything is evenly coated.
Taste and adjust: add a pinch more salt, an extra squeeze of lemon, or a little more mustard depending on how tangy you like it.
Chill for 15–30 minutes if you have time (it gets better), then serve in a sandwich, stuffed into a pita, scooped with crackers, or piled into lettuce cups.