Shrimp & Bok Choy Noodle Soup

Name: Shrimp & Bok Choy Noodle Soup
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Cuisine: Asian, Japanese
Ingredients: 1 tablespoon olive oil; 2 green onions (white & green parts divided, sliced); 2 cloves garlic (minced); 6 ounces sliced baby portobello mushrooms; 6 cups vegetable broth; 1 tablespoon soy sauce; 1/2 teaspoon crushed red pepper flakes; 1/4 teaspoon ground ginger; 2 cup savoy cabbage; 1 head baby bok choy (sliced); 3 ounces dry soba noodles; 12 ounces peeled (deveined shrimp); Cilantro (for garnish); Shichimi Togarashi (if desired)