01 - Place eggs in a saucepan and cover with cold water by about an inch. Bring to a rolling boil over high heat, then immediately reduce heat to maintain a gentle simmer. Cook for exactly 10 minutes for fully set yolks. Drain and transfer eggs to an ice bath or run under cold running water for 3-4 minutes to stop cooking and ease peeling.
02 - Once cooled, peel the eggs carefully. Pat dry with paper towels, then chop into 1/2-inch pieces. Set aside on a plate or cutting board.
03 - In a large mixing bowl, combine cottage cheese, Dijon mustard, and lemon juice. Whisk vigorously until smooth and thoroughly incorporated. Season with salt and pepper, tasting as you go.
04 - Add the chopped eggs, diced celery, red onion, sliced chives, and chopped parsley to the bowl. Using a rubber spatula, gently fold everything together just until combined. Take care not to overmix—you want distinct chunks of egg throughout, not a mashed texture.
05 - Taste the salad and adjust salt and pepper if needed. For a smoky finish and color contrast, lightly dust the top with smoked paprika. Serve immediately chilled on toasted whole-grain bread, nested in butter lettuce cups, or as a satisfying sandwich filling.