For a milder flavor, remove the seeds and membranes from the jalapeno pepper. For extra heat, leave some seeds in. If you don't have freeze-dried dill, you can use 1 tablespoon of fresh dill, finely chopped. This pickle de gallo is best served fresh. It can be stored in an airtight container in the refrigerator for up to 3 days, but the pickles may soften over time. Experiment with different types of pickles! Bread and butter pickles or spicy pickles can add a unique twist to the recipe.