Shrimp with Lobster Sauce

Name: Shrimp with Lobster Sauce
Ingredients: 1 pound raw peeled and cleaned shrimp (extra-jumbo, 16 to 20 per pound); 2 cloves garlic; 1 (1-inch) piece ginger; 3 medium scallions, plus more for garnish; 2 large eggs; 1 cup water; 1 tablespoon cornstarch; 2 teaspoons chicken bouillon powder, such as Lee Kum Kee or Knorr; 1 teaspoon toasted sesame oil; 2 teaspoons oyster sauce; 1/2 teaspoon ground white pepper; 1/2 teaspoon granulated sugar; 2 tablespoons avocado or olive oil; Kosher salt; Steamed white rice , for serving