Mu Doenjang Guk (Korean Soybean Paste Radish Soup)

Name: Mu Doenjang Guk (Korean Soybean Paste Radish Soup)
Cuisine: Asian, Korean
Ingredients: 1 pound Korean radish (mu (무)); 2 tablespoons doenjang (된장 (Korean fermented soybean paste)); 1 green part of a large scallion; soup soy sauce or salt to taste; 1/4 medium onion; 2 dried shiitake mushrooms; 1 small piece dried kelp (about 3 inch square, dashima 다시마); 1 white part of a large scallion; 3 to 4 plump garlic cloves; 1 or 2 dried whole red chili peppers (or fresh hot chili peppers - optional); 6 cups of rice rinsed water (ssalddeumul (or plain water with 1 teaspoon of flour or rice flour))