Traditionally, this soba noodle salad is served cold. Mirin is a sweet wine that can be found in most Asian grocery stores. I do not know of any substitute.
Bring lightly salted water to a boil in a large pot. Add soba noodles; cook, stirring occasionally until tender, about 5 minutes. Drain and rinse with cold water. Set aside.
Heat olive oil in a skillet over medium heat. Cook and stir ginger and garlic until golden brown, about 3 minutes. Remove from heat.
Mix ginger, garlic, miso paste, lime juice, and mirin together in a small bowl. Pour salad dressing mixture over soba noodles. Top with green onions, sesame seeds, and cilantro. Chill until serving.
Per Serving: 456 calories; protein 18.5g; carbohydrates 91.3g; fat 5.3g; sodium 1225.2mg.