In a medium bowl, mix together the ground beef, chorizo, onion powder, cumin and 2 teaspoons each salt and pepper. Form the mixture into palm-size balls.
Heat a griddle or large skillet over medium-high heat. Place the balls on the griddle and smash with a spatula or the back of a spoon. Cook, flipping once, until cooked through. Divide the Cheddar and queso blanco among the burgers and let melt. Remove the burgers to a plate.
Meanwhile, combine the mayonnaise, ketchup and lime zest and juice in a bowl; mix to blend. Add cumin, salt and pepper to taste.
Toast the slider buns on the griddle. Serve the burgers on the buns, topped with some rosada sauce.
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This recipe was created by a contestant during a cooking competition. It has not been tested for home use.
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