Rinse 1 pound pre-cooked shrimp in a colander (see notes if cooking the shrimp yourself) under cold water, removing any shells, veins, or tails as necessary. Cut shrimp in half lengthwise and then cut each half into thirds. Set aside.
In a medium bowl, add ½ teaspoon hot sauce, 1 teaspoon lemon zest, 1 Tablespoon dill, 1 Tablespoon mustard, 1 Tablespoon Worcestershire, 2 Tablespoons lemon juice, 2 Tablespoon yogurt, ¼ cup mayonnaise 1 minced celery, ¼ cup onion, 3 radishes, and salt and pepper. Taste and adjust salt and pepper or add more of any ingredients you want to, like hot sauce or mustard.
Add the shrimp to the dressing, tossing until all the shrimp is covered.
Serve the shrimp salad either on bib lettuce cups as a salad main dish, or on toasted, buttered buns (see next step) with the lettuce also on the bun for a sandwich.
If serving as sandwiches, slice the buns and lightly butter. Place the buns under a broiler, butter side up until just starting to turn golden around the edges.