Shell Pasta Salad with Salmon and Green Beans

Bring a large pot of salted water to a boil, add pasta and cook until al dente. Drain and rinse pasta under cold running water. Drain again and set aside. Blanch green beans in boiling water for 2 minutes. Drain and rinse under cold running water. Drain again and set aside. In food processor or through a sieve, puree cottage cheese. Combine with yogurt and lemon juice; mix well In a large bowl, combine pasta, green beans, yogurt mixture and dill; stir to mix. Discard skin from salmon and break into chunks; add to salad and stir gently to mix. Add pepper to taste. Line serving plate with lettuce leaves and mound salad on top.