Corn Som Tam With Shrimp Recipe

Name: Corn Som Tam With Shrimp Recipe
Ingredients: 1 pound large shrimp, peeled and deveined; 2 quarts water; 2 tablespoons salt; 4 ears of corn, in their husks; 2 medium cloves garlic, peeled and minced (about 2 teaspoons); 3/4 cup plain roasted peanuts; 2 bird's eye chilies or 1 Serrano chili; 1/4 cup dried shrimp (optional); 2 medium tomatoes (about 3/4 pound), cut into 1-inch cubes; 1/4 pound green beans, trimmed and cut diagonally into 1-inch pieces; 1 cup packed grated carrots; 2 limes; 1 tablespoon granulated sugar (or more to taste); 1 tablespoon fish sauce (or more to taste)