Add 1 c. vegetables (except peas) and 1 1/2 c. broth to a blender. Puree until smooth. Add parsley, 1 oz asiago, tarragon, yogurt, sour cream, zest and lemon juice to contents of blender. Puree until smooth. Combine chicken, pasta, remaining vegetables and broth, peas, and contents of blender to a large bowl. Stir well.