Melt butter in large skillet over medium heat. Add ham or turkey, stirring until heated. Add half and half and simmer gently.
In the meantime, put pasta in boiling, salted water. Add the peas after 2 minutes gto cook along with pasta. When pasta is cooked and "al dente," drain. Over medium heat, toss pasta and peas with ham mixture and parmesan until thickened.