Snapper Fish Tacos

Name: Snapper Fish Tacos
Ingredients: 1 Tbs. vegetable oil, plus more for brushing; 2 jalapeño chilies, quartered lengthwise and seeded; 6 boneless, skinless snapper or other firm white fish fillets, each 4 to 5 oz.; Salt and freshly ground pepper, to taste; 12 to 16 corn tortillas, each 6 inches in diameter; 2 limes, cut into wedges; 1/2 head iceberg lettuce, shredded; 1 1/2 cups fresh salsa; Chopped onions for serving (optional); Chopped tomatoes for serving (optional); Chopped cucumbers for serving (optional); Chopped fresh cilantro for serving (optional); Hot-pepper sauce, to taste; 1 handful of hardwood chips, soaked in water for 30 minutes