Place the ham in a large kettle of water seasoned with salt, pepper and the jalapenos and bring to a boil. Reduce heat; cover and simmer about 20-30 minutes to infuse flavor. Quarter cabbage and slice core from each quarter. Rinse each quarter well with cold water, then slice each quarter into several thin wedges. Return the seasoned water to a boil and add cabbage. Steam, uncovered, about 5 minutes. Reduce heat, cover and simmer until as tender as desired, about 25-30 minutes longer. Drain and serve with vinegar (for splashing) at the table. Yield: about 8 servings.