Gomtang (Korean beef soup: 곰탕)

Name: Gomtang (Korean beef soup: 곰탕)
Prep time: 45 min
Cook time: 1 h
Total time: 1 h 45 min
Cuisine: Asian, Korean
Ingredients: 2 pounds beef brisket; 2 pounds beef tendon; 8 ounces Korean radish (or daikon), cut into chunks; 2 dae-pa (large green onions), one chopped, the other sliced 2 inches long; 1 medium-size onion, quartered; 12 garlic cloves; 2 ounces dangmyeon (sweet potato noodles, or glass noodles), soaked in cold water for 40 minutes; 1 tablespoon fish sauce; 1 tablespoon plus 1 teaspoon kosher salt; ground black pepper and hot pepper flakes to taste; cooked rice; gochu-garu (Korean hot pepper flakes) to taste (optional); 2 eggs; ¼ teaspoon kosher salt; 1 teaspoon cooking oil (or grape-seed oil, vegetable oil, etc)