Healthy Fish Tacos

reduced-fat (2%) plain yogurt

fresh lime juice (divided use)

finely chopped cilantro (divided use)

medium tomato (chopped)

medium onion (chopped)

medium jalapeño (seeds and veins removed, chopped (optional))

white fish ((like cod, halibut, or mahi mahi), washed, patted dry)

sea salt ((or Himalayan salt) (to taste; optional))

(6-inch) whole-wheat tortillas, warm

shredded cabbage

lime wedges ((for garnish; optional))