COMBINE broth with garlic, soy and ginger in a large saucepan. Boil, then reduce heat to medium-low. Simmer, covered, 10 min. Discard garlic.
COVER eggs with water in a medium saucepan and boil over medium-high for 4 min. Transfer eggs into a bowl of cold water. Add bok choy to boiling water and cook until bright green, about 1 min. Transfer bok choy to a plate. Add noodles to water (discard seasoning packets). Stir until noodles are soft, 2 to 4 min. Drain and rinse well with cold water.
PEEL eggs and cut in half. Divide noodles among 4 bowls. Pour in chicken broth. Top with eggs, bok choy, green onion and sesame seeds. Drizzle with sriracha.