Kimchi and Beef Wontons

Name: Kimchi and Beef Wontons
Ingredients: 6 ounces ground beef, thawed if frozen; 1 large egg, beaten; ¾ cup kimchi (from a 16-oz. jar), drained and finely chopped, plus 2 Tbsp. liquid from jar; ½ cup frozen riced cauliflower or broccoli; 1 1-in. piece fresh ginger, grated; 4 scallions, finely chopped, divided; 1 teaspoon kosher salt, divided, plus more for water; 1 ¼ teaspoons soy sauce, divided; 32 square wonton wrappers; 2 shallots, thinly sliced (½ cup); ¼ cup vegetable oil; 3 tablespoons toasted sesame seeds