Lima beans are easy to cook. Fresh ones are best but frozen ones will turn out well too. The key is patience and good seasoning.
1 large package of frozen baby limas or fresh lima equivalent
Ham hock, side meat or streak of lean
Fill a large pot 2/3 full of water. Bring to a boil. Add in 2 ham hocks or a 2" chunk of side meat (fat back) or streak of lean. Let it boil for 5 minutes. Then add beans and turn heat down to keep the beans boiling softly - medium heat. Let cook until the beans are tender. Add salt and pepper to taste.
Add salt and pepper after cooking has completed. Butter will not work as seasoning. It doesn't have the flavors that bring out the best in the beans. This method will work for green beans, lima beans, peas, corn, most vegetables. You can find the meat in the ham section of your grocery store. All three are equally good seasoning products.