DAI CHILE-FISH SOUP WITH FLAVORED OIL

Name: DAI CHILE-FISH SOUP WITH FLAVORED OIL
Cuisine: Asian
Ingredients: 1 1/4 to 1 1/2 lbs firm-flesh fish steaks or fillets; 4 cups water; 3 dried red chiles; 2 fresh green bird chiles or serrano chiles; 1 Tbsp ginger (, cut into small matchsticks); 1 garlic clove (, smashed); 1 large or 2 small scallions (, sliced lengthwise into ribbons, then crosswise into 2-inch lengths); 1 cup coriander leaves and stems (, coarsely chopped); 1 medium tomato (, ripe or green, as you wish, finely chopped (I used green tomatoes)); 1 1/2 to 2 tsp salt (, or to taste); Freshly ground black or white pepper; 2 Tbsp peanut oil or vegetable oil; 4 dried red chiles; 1 Tbsp thinly sliced garlic