After you’ve devoured half the ham, the rest goes in the fridge. To reheat leftovers safely, bring them back to 165°F if you’re doing it in a microwave or oven. Yes, that’s higher than the original temp—but it’s a safety net because leftovers can pick up bacteria during storage. Don’t worry; a little extra heat won’t ruin your ham sandwich tomorrow.
If you’re making ham salad or soup, just get it piping hot throughout. No one wants a cold ham soup. That’s just sad ham water.