Meanwhile, place the walnuts in a small skillet and toast over medium heat for 5 to 6 minutes or until fragrant and golden brown, stirring frequently. Remove the walnuts from the heat to cool.
Mix 2 tablespoons of the reserved orange liquid and 1 tablespoon of the Hoisin sauce in small bowl; set aside.
Grill the chicken over medium heat for 10 to 12 minutes or until no longer pink in the center, turning once and brushing with the remaining Hoisin sauce.
Remove the chicken from the grill and slice into strips. Line 4 serving plates with the lettuce leaves and drizzle with the orange liquid and Hoisin mixture.
Top each plate with 1/2 cup of cottage cheese. Top the cottage cheese with the drained oranges and walnuts. Arrange the chicken on top of the salad.