How to Cook Sweet Potatoes. Sweet potatoes, also called yams, are a delicious and nutritious food that can be made into a variety of side dishes. You can easily cook whole sweet potatoes in the oven or peel, cube, and roast them. By. Heat oven to 200 degrees C. Toss the sweet potatoes with oil in a baking dish. Sprinkle over some coarse salt. Cover and bake for half an hour, then remove cover and allow to crisp up for 10 - 20 minutes. Sweet potatoes are one of the healthiest foods you can add to your diet. But, like anything, they can get boring if they're prepared the same way every time you eat them. Luckily, there are plenty of ways to spice them up. The sweet potato is arguably the most versatile veggie in the produce department. It can easily be the star of any meal, from breakfast to dinner and even dessert. And while baking sweet potatoes in the oven can take up to an hour, microwaving them takes a mere five minutes. Here’s the very best way to do it, so that you can dig into your tender, steaming sweet potato ASAP. Preheat oven to 220ºC. On a baking sheet, prick sweet potatoes all over with a fork. Bake until tender, 45 to 50 minutes. Let cool, then split the tops open with a knife and top with a pat of butter. It's been a long and tiring summer, encompassing a major illness, lots of applications, and transatlantic travel. One month I spent nights in 11 different cities in four different countries. A look back at the diary where I've recorded every dinner I've eaten since the second week of January confirms the fatigue I've felt followed… Cut the potatoes into 1 inch (2.5 cm) pieces. Take a sharp knife and carefully cut each potato in half. If you're preparing new potatoes that are small, you might not need to cut them further.For larger potatoes, continue to cut the potatoes until they're in even 1 inch (2.5 cm) pieces. For very tender potatoes, peel them before you cut them. How to cook a sweet potato. How to cook a sweet potato. Skip navigation Sign in. Search. Loading. Close. This video is unavailable. Watch Queue Queue. Watch Queue Queue. Remove all; Get information and advice on how to buy, store, prep and cook sweet potatoes. Plus, learn the difference between sweet potatoes and yams. The sweet potato or sweetpotato (Ipomoea batatas) is a dicotyledonous plant that belongs to the bindweed or morning glory family, Convolvulaceae.Its large, starchy, sweet-tasting, tuberous roots are a root vegetable. The young leaves and shoots are sometimes eaten as greens.The sweet potato is commonly thought to be a type of potato (Solanum tuberosum) but does not belong to the nightshade.