Fresh peas are butter-steamed with lettuce and green onions, then tossed with prosciutto and pasta shells. Serve cold as a salad or luncheon dish.
1. Melt the butter in a large skillet. Add the onions, shredded lettuce, and peas, tossing to coat. Cover the pan and cook over low heat for 15 to 20 minutes or until the peas are crisp-tender.
2. Pour on the chicken broth. Add the prosciutto, basil, salt, and pepper. Stir over high heat until most of the liquid is evaporated. Blend in the Parmesan cheese and remove the pan from the heat.
3. Stir in the sour cream and lemon juice. Add the drained pasta shells and toss to combine. Cover and refrigerate until thoroughly chilled.