Cook the Macaroni. Add the macaroni pasta and water to the Instant Pot. Cook on high pressure for about 4 minutes, then quickly release the pressure and drain the pasta.
Prepare the t. In a bowl, whisk together mayonnaise, Dijon mustard, lemon juice, salt, and pepper to create the dressing.bsp
Combine Ingredients. In a large mixing bowl, combine the cooked macaroni, drained tuna, chopped red cabbage, chopped celery, grape tomatoes, corn, peas, dill pickle relish, and fresh dill.
Toss and Dress. Gently toss the ingredients to combine. Pour the dressing over the macaroni mixture and stir until everything is well-coated and the flavors meld.
Chill and Serve. Refrigerate the salad for about 30 minutes before serving, allowing the flavors to meld further. Garnish with additional fresh dill before serving.