Spicy Yucatecan Beef “Salad” Tacos

Name: Spicy Yucatecan Beef “Salad” Tacos
Ingredients: 1pound beef skirt steak; 2tablespoons vegetable oil; 1small (4-ounce) white onion, roughly chopped; 2 garlic cloves, peeled and roughly chopped; Salt; A 12-inchpiecebanana leaf, defrosted if frozen (optional); 16 to 18 corn tortillas; For the Xnipec Salsa; 1/2small (2-ounce) red onion, minced; 5 tablespoons fresh sour orange juice OR 3 tablespoons fresh lime juice plus 2 tablespoons fresh orange juice; 1medium (8-ounce) red ripe tomato, chopped into 1/4-inch pieces; 3 radishes, chopped into small pieces; 1/2 to 1 fresh habanero chile (depending on your preference for heat), seed pod removed, flesh chopped finely; 6large sprigs cilantro, chopped (stems and all)