Creamy Chicken-Pasta Soup

    3 tablespoons butter
    4 ounces button mushrooms, sliced
    1 cup sliced celery
    1 cup shredded carrots (about 2 medium)
    1 medium onion, chopped
    3 tablespoons all purpose flour
    6 cups chicken stock or canned low-salt chicken broth
    1 1/2 cups half and half
    2 tablespoons chopped fresh parsley
    1 1/2 pounds chicken tenders, cut into 1/2-inch pieces
    1 cup penne pasta
    1/4 pound sugar snap peas, halved diagonally
    3 tablespoons fresh lemon juice

Melt butter in heavy large pot over medium heat. Add mushrooms,
celery, carrots and onion. Cook until celery and onion are tender,
about 5 minutes. Add flour and cook 3 minutes, stirring frequently.
Gradually mix in chicken stock. Bring soup to simmer, stirring
frequently. Add half and half and chopped parsley and simmer 5
minutes. Add chicken tenders and simmer until cooked through,
about 5 minutes.

Cook penne pasta in large pot of boiling salted water until just
tender but still firm to bite. Drain pasta. Bring chicken soup to
simmer. Mix in cooked pasta and sugar snap peas and simmer 2 minutes.
Mix in lemon juice; season to taste with salt and pepper.