How to Make It
In a food processor, puree the yogurt, jalapeños, cilantro, ginger, onion, sugar and 1 teaspoon of the salt until smooth. Transfer to a bowl.
In another bowl, mix the ground beef with the bacon, scallions, mint, cheese, lemon zest, lemon juice, black pepper, cayenne and the remaining 1 1/2 teaspoons of salt. Form into eight 1-inch-thick patties.
Heat a cast-iron griddle and brush with oil. Cook the burgers over moderate heat, turning once, until charred outside and medium within, 6 to 8 minutes.
Spread some of the yogurt sauce on the bottom buns, top with the burgers and layer with toppings. Close the burgers and serve.