First things first, let's create that delicious avocado spread. In a medium bowl, combine the two peeled and pitted avocados. Mash them until smooth but leave a few chunks for texture. Mix in the lime juice, serrano chili, finely diced onion, minced garlic, chopped tomato, kosher salt, ground mustard, and cilantro. Finally, add that dash of smoked paprika. This burst of flavor will be the heart of your sandwich.

Now, let's build the Beach Club. Take your sub roll and slice it lengthwise. On one side of the roll, slather a generous spoonful of your avocado spread. On the other side, spread the mayonnaise and Dijon mustard mixture for an added kick.

Begin layering with the smoked turkey breast. A hearty handful is just right. Next, add a slice of provolone cheese. It melts in your mouth! Follow this with slices of cucumber, juicy tomatoes, and a handful of shredded iceberg lettuce. Top it off with sliced avocado to enhance your sandwich's creaminess.

Once all ingredients are layered, sprinkle some alfalfa sprouts for a crunchy texture. Gently place the top of the sandwich on and press down slightly. If you're feeling adventurous, a quick grill in the pan for a crispy finish can work wonders too.

Slice your sandwich in half if preferred and serve immediately. Enjoy alongside your favorite summer drink. You can’t go wrong with lemonade or iced tea here.