1. Melt the coconut oil in a saucepan at high heat. Place bok choy halves in pan to form a single layer. Add water, rice vinegar, mushrooms, carrots, garlic, ½ teaspoon salt, and turmeric. Cover pan and braise vegetables for 5 to 8 minutes.
2. Place the braised bok choy and mushroom mixture over soba noodles. Garnish with cucumber and scallions.