In a large skillet, heat the EVOO, 3 turns of the pan, over medium heat. Add the prosciutto and cook until lightly browned, 3-4 minutes. Add the bay leaf and onion, cover and cook, stirring occasionally, to soften the onion, about 5 minutes. Add the stock and bring to a boil. Reduce to a simmer, add the peas and simmer for 5 minutes. Season with salt and pepper. Fish out and discard the bay leaf. Just before serving, toss in the parsley.