Chicken Arroz Caldo

Name: Chicken Arroz Caldo
Ingredients: ½ pounds, ⅞ ounces, weight Chicken Breast, Cut In Chunks; 4 cups Water Or Chicken Stock; 1 whole Red Onion, Cut Thinly Into Strips, Divided; 5 cloves Garlic, Crushed; 1 teaspoon Whole Peppercorns; 3 teaspoons Fish Sauce, Divided; ½ teaspoons Salt; 2 Tablespoons Cooking Oil; ¼ cups Ginger, Cut Thinly Into Strips, Divided; ½ cups Uncooked Rice, Washed; 1 teaspoon Freshly Ground Peppercorns (ground Pepper Will Do, If No Pepper Grinder); 1 whole Lemon, To Serve; 2 stalks Green Onions, Chopped