In a small bowl, combine all Pickled Pico ingredients. Stir well combine and keep in refrigerator until ready to build the burger.
In a bowl, combine burger ingredients. Form into 12 patties just barely bigger than the slider buns. Place patties on hot grill. Cook for 3-4 minutes then flip. Place quartered cheese slice on each patty and cook another 3-4 minutes. Remove from heat.
Build the Burger: Spread sour cream on bottom bun and top with shredded lettuce. Lay cheese slider on top and spoon pickled pico on top. Place top bun on and gently press down to hold everything together (or you could secure it with a long toothpick). Serve 2 per person.