One 18-ounce box frozen popcorn shrimp
4 tablespoons unsalted butter
2 cloves garlic, finely chopped
Kosher salt and freshly ground black pepper
1 cup dill pickle chips
1/3 cup sour cream
1/3 cup mayonnaise
2 teaspoons hot sauce, plus more for serving
One 20-by-5-inch loaf soft French or Italian bread (about 1 pound)
4 cups shredded iceberg lettuce (about 1/2 small head)
1 large ripe tomato, thinly sliced
1/4 cup fresh parsley leaves, chopped
Potato chips, for serving