Taco de Lechuga with Piloncillo BBQ Shrimp

I’ve seen some wild variations on the taco theme (foie gras tacos, raw food tacos, s’mores taco cookies, and deep-fried tacos as big as plates, for example), so I’m open-minded about what makes a taco a taco, as long as all works in my mouth. Here, instead of the expected tortilla, the sweet-spicy shrimp mixture is rolled up in crisp lettuce leaves with plenty of onion and cilantro. This is a great recipe to make for a group or set out for a party, with the lettuce and garnishes alongside.