Grilled Fish or Chicken Tacos

Name: Grilled Fish or Chicken Tacos
Ingredients: 3 tablespoons vegetable oil; 1 tablespoon ancho chile powder; 2 teaspoons chipotle chile powder; 1 teaspoon dried oregano; 1 teaspoon ground coriander; 2 garlic cloves (minced); Salt; 2 tablespoons tomato paste; 1/2 cup orange juice; 6 tablespoons lime juice (3 limes); 2 lbs. skinless swordfish steaks (1 inch thick, cut lengthwise into 1-inch-wide strips); 1 pineapple (peeled, quartered lengthwise, cored, and each quarter halved lengthwise); 1 jalapeño chile; 18 6-inch corn tortillas; 1 red bell pepper (stemmed, seeded, and cut into 1/4-inch pieces); 2 tablespoons minced fresh cilantro (plus extra for serving); 1/2 head iceberg lettuce (4 1/2 ounces, cored and thinly sliced); 1 avocado (halved, pitted, and sliced thin); Lime wedges