How to Make It
Light a grill or preheat a grill pan. In a large bowl, gently mix the ground pork with the chorizo, ricotta and capers. Form the meat into six 3/4-inch-thick patties and season lightly with salt and pepper.
Grill the burgers over moderately high heat, turning once, until lightly charred and cooked through, about 10 minutes; top the burgers with the cheddar during the last minute of grilling and let melt. Transfer the burgers to a work surface and let rest for 5 minutes.
Spread mayonnaise and ketchup on the buns and set the burgers on the bottom halves. Top with the pickles and lettuce and close the burgers; serve right away.