Fish Ssäm with Spicy Chile Sauce

Name: Fish Ssäm with Spicy Chile Sauce
Ingredients: 3 tbsp. vegetable oil; 2 tbsp. soy sauce; 2 tsp. mirin; 2 tsp. minced ginger; 1 tsp. Chinese red chiles in oil; 1 tsp. sherry vinegar; 1⁄2 tsp. toasted sesame oil; 3 scallions, thinly sliced; Kosher salt and freshly ground black pepper; 8 oz. snow peas, trimmed; 5 tbsp. packed cilantro leaves, thinly sliced; 5 tbsp. packed mint leaves, thinly sliced; 5 tbsp. packed Thai basil leaves, thinly sliced; 2 tbsp. plus 4 tsp. olive oil; 1 tbsp. fish sauce; Juice of 2 limes (about 1/4 cup); Four 3-oz. porgy or snapper fillets; 1⁄2 cup crème fraiche; 1 head bibb lettuce, cored and separated into leaves