In a medium bowl, combine ground chicken, dry ranch seasoning, diced dill pickles, and pickle brine until thoroughly incorporated.
Divide the chicken mixture into 8 equal portions and roll into small balls.
Heat a large non-stick skillet or griddle over medium-high heat.
Place a chicken ball in the center of the skillet. Immediately place a flour tortilla over the chicken ball and use a heavy spatula or burger press to smash the chicken flat until it reaches the edges of the tortilla.
Cook for 3 to 4 minutes until the chicken is browned and fully cooked. Flip the tortilla over so the chicken side is facing up.
Sprinkle 1/4 cup of shredded cheddar cheese in a circle around the edges of the tortilla, allowing some cheese to melt underneath the rim to form the lace.
Cook for 1 to 2 minutes until the cheese is bubbling, browned, and crispy.
Carefully remove the taco with a thin spatula, ensuring the cheese lace remains attached.
Top with shredded lettuce, sliced pickles, a drizzle of ranch dressing, and fresh dill. Fold and serve.