In a medium saucepan, cover the grain of choice with 2 inches of water. Bring to a boil, cover and simmer over moderately low heat until tender, about 25 minutes. Drain and let cool for about 10 minutes.
Finely grate 1 tsp. zest from 1 orange; set aside. Using a sharp knife cut all peel and white pith from all 2 oranges. Cut between membranes to release segments into a medium bowl; discard membranes.
In a bowl whisk together zest, lemon juice, vinegar, garlic, oil, salt and fennel fronds.
Toss the grains, citrus, fennel and nuts (if using). Add vinaigrette and toss again.
Trim off any thick stems from sweet potato greens then add to boiling water and blanch for 60 seconds
Immediately transfer sweet potato greens to a bowl filled with ice water to stop the cooking. Drain
Heat oil in a large pan or wok over medium heat. Add scallions, garlic, ginger, turmeric, peppers, and lemongrass. Stir until fragrant, 1 to 2 minutes. Stir in soy sauce
Add coconut milk and water, then bring to a simmer
Add blanched greens and return to a boil; reduce heat to low and simmer for 2 minutes
Season with salt and pepper to taste, and squeeze of lime.
Spoon into bowls and serve with rice or grain of your choice.
