Cook the Pasta: Start by bringing a large pot of salted water to a rolling boil. Add the elbow macaroni or rotini and cook according to the package instructions until al dente. Once done, drain the pasta and immediately rinse it under cold water to stop the cooking process and cool it down.
Prepare the Vegetables: While the pasta cooks, take the time to finely chop the dill pickles, red onion, and bell pepper into small, bite-sized pieces, ensuring they blend well into the salad.
Make the Dressing: In a medium-sized bowl, mix together the mayonnaise (or Greek yogurt), dill pickle juice, Dijon mustard, dried dill, and season with salt and pepper. Stir until all the ingredients are well incorporated and creamy.
Combine Ingredients: In a large mixing bowl, add the cooled pasta along with the diced dill pickles, red onion, and bell pepper. Pour the dressing over the top of the pasta mixture.
Toss Well: Gently toss all the ingredients together using a spatula or large spoon, ensuring each piece of pasta and vegetable is fully coated with the dressing for the best flavor.
Chill: Cover the mixing bowl with plastic wrap or a lid and refrigerate the pasta salad for at least 30 minutes. This chilling time allows the flavors to meld beautifully.
Serve: Before serving, give the salad a good stir to redistribute the dressing. Taste to check for seasoning and adjust with additional salt, pepper, or dill pickle juice as needed. Garnish with fresh dill sprigs and the reserved pickle slices for an extra pop of flavor and color.