Preheat oven to 350 degrees. Pour water over walnuts and drain. Toss walnuts with sugar and place on a parchment lined baking sheet. Bake for 5-7 minutes. Set aside. In a small bowl, whisk toghether apple juice concentrate, honey, garlic, and thyme.
Change oven setting to broil. Place salmon fillets, skin side down on a nonstick broiler pan and brush with cider mixture. Broil 4 inches from heat for about 10-12 minutes or until firm to the touch, basting once. Remove fish from broiler and baste once more.
Spray a small saucepan with canola cooking spray. Add shallots and saute until just softened, about 2 minutes. Remove from heat and add any remaining basting glaze, the vinegar and the walnut oil.
Cut bases from endive and separate spears. Divide among 4 plates. Slice apples thinly and arrange in small fan groupings of plates. Place salmon on top and sprinkle with walnuts. Drizzle dressing over salads, garnish with sprigs of thyme and serve immediately.
Provides 2.57g omega-3s.