Swordfish over Ginger Hot and Sour Soba Soup

Name: Swordfish over Ginger Hot and Sour Soba Soup
Ingredients: 4 cups water; 2 (6 ounce) swordfish steaks; salt and freshly ground black pepper to taste; 2 tablespoons reduced-sodium vegetable bouillon; 1 medium lime, juiced, divided; 1 cup shredded carrots; 1 cup bean sprouts; 2 tablespoons reduced-sodium soy sauce; 4 green onions, chopped; 1 red jalapeno pepper, seeded and diced, or to taste; 1 stalk lemongrass, split lengthwise; 5 sprigs cilantro, stemmed and roughly chopped; 1 tablespoon minced garlic, divided; 1 ounce finely chopped ginger; 2 tablespoons olive oil, divided; 5 ounces shiitake mushrooms, stemmed and sliced; 2 heads baby bok choy, cut into 1-inch pieces; 14 ounces buckwheat noodles; 3 drops sesame oil, or more to taste