Omani Paplou Soup (Fish Soup)

Name: Omani Paplou Soup (Fish Soup)
Prep time: 15 min
Cook time: 45 min
Total time: 1 h
Cuisine: Asian, Indian
Ingredients: 3 cloves garlic; 1 2-inch piece fresh ginger, peeled and thinly sliced; ¾ teaspoon ground turmeric (divided); 1 teaspoon kosher salt; ¼ cup fresh cilantro (chopped, plus more for garnish); 1 chili (jalapeno or serrano, minced); 1 dried lime; ¼ teaspoon black pepper (ground); 1 plum tomato (cored and diced); 1 small or ½ medium red onion (diced); ¼ cup freshly squeezed lime juice; ⅛ teaspoon cayenne; 1 pound tuna steaks (cut into bite size pieces); Cooked basmati rice (for serving); Lime wedges (for garnish)