A favorite recipe here is Mac & Cheese with Ham & Peas. Make your usual Mac & Cheese (even the box type), then stir in 1 cup each of diced ham and frozen green peas. Bake for 15-20 minutes (or microwave for about 3-4 minutes) to warm the ham and cook the peas.
I also make a ham spread by grinding 1/2 pound of left-over ham and mixing it with 8 oz. of softened cream cheese and 2 oz. of sliced pimientos. I "grind" the ham in my food processor and then add the cream cheese and continue to process until fairly smooth. I stir in the pimientos by hand since I don't want them pulverized. Add some milk, cream, or even yogurt to thin the spread if it's too thick. We love this on pumpernickel bread, but it's just as good on buns, English muffins, or even biscuits. You can thin it down even more and use it as a dip.
I pinned a ham loaf recipe that turned out pretty good. It came from the Taste of Home website -- Ham Loaf recipe .
And, along the line of the Mac & Cheese above, you can add diced, sliced, or shredded ham to a scalloped potato dish.