Thai Fish Burgers

Name: Thai Fish Burgers
Ingredients: 1 lb. boneless, skinless cod fillet, roughy chopped; 1 ⁄ 4 cup thai red curry paste; 2 tbsp. finely chopped cilantro, plus 2 cups cilantro leaves; 3 kaffir lime leaves, finely chopped; 3 tbsp. roughly chopped roasted, salted peanuts; 2 tsp. Kosher salt; 2 tbsp. olive oil; 4 hamburger buns, split; 2 tbsp. granulated sugar; 1 garlic clove; 1 Thai chile, stemmed; 2 tbsp. fish sauce; 1 tbsp. fresh lime juice; 1 English cucumber, thinly sliced on the bias; 1 small red onion, thinly sliced