Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to prepare mashed potatoes [title] Peel the potatoes. [step] After you wash the potatoes thoroughly under cool water, use a sharp knife or a potato peeler to peel off the skin. You can also keep the skin on yukon gold or red skin potatoes, if you like, but baking potatoes should be peeled.

Ending1: [substeps] Peel the potatoes if you decide to peel them. Puree the potatoes instead of peeling them. Ending2: [title] Heat oil in a large skillet over medium heat. [step] Turn off the heat and add the oil to a large skillet. Ending3: [title] Boil the potatoes in a large pot of water. [step] First, boil the water by itself, adding a pinch of salt. Ending4: [substeps] Peeled potatoes, then with a fork, mash them. Pureeing for several days will ensure that it doesn't spoil, and more importantly, it's an easy and healthy way to roast the potatoes.

Answer format: ending1/ending2/ending3/ending4