Step 1

First, make the herby yogurt. To a small bowl, add yogurt, 1 pressed garlic clove, 2 tablespoons each cilantro and mint, and lime juice. Season with salt to taste and stir to combine. Set aside while you make the beef.

Step 2

Heat a large skillet over medium-low. Add the olive oil. Add the onion, season with salt and cook until softened and lightly browned around the edges, 3-5 minutes. Add remaining 2 pressed garlic cloves and cook until fragrant, about 30 seconds. Add the ground beef and smash into small pieces with the back of a spoon. Sprinkle with salt. Cook, without stirring, about 6 minutes, until mostly cooked through.

Step 3

Add the sugar, fish sauce, soy sauce, and red pepper flakes and cook, stirring occasionally, until the beef is cooked through, about 2 minutes more. Turn off heat and stir in remaining cilantro and mint. Season with additional salt to taste.

Step 4

To serve, swirl a dollop of yogurt into a lettuce cup, spoon beef on top, and sprinkle on a few dashes of hot sauce.