If they are left out in the air not very long. They turn brown pretty quick.
However, you can cut them and store in a large bowl with water. This will keep the potatoes from oxidizing, just make sure they are completely covered.
It isn't recommended to cut the potatoes a few days before cooking. As soon as they are cut, the air will hit it and turn the insides brown (like an apple). You can cut them the night before and soak the potatoes in water until ready to cook.
I wouldn't recommend having a marinade on potatoes overnight. You can cut your potatoes up the night before and have them soak in water to avoid turning them brown/black. Just make sure the water is about an inch over the potatoes. If you want to marinate, an hour of soak time is good enough for potatoes. It's the oxygen that is touching the potatoes that turns them, so there might be some areas of the potato not completely covered in oil. If you still want to try it, make sure to have an airtight lid on.
Yes, it is okay to cut up sweet potatoes ahead of time as long as they are stored properly in the refrigerator to prevent them from spoiling.
you put cut up potatoes and fry them in a pot of oil.
You can soak the peeled and cut potatoes for up to 24 hours prior to boiling.
no they will not turn brown
No, both are equally healthful. It's what you put in the mashed that will make it unhealthy or not.
Yes, potatoes can be prepared up to 24 hours in advance of cooking.You will need to ensure they are covered with cold water to stop them turning black.The seasoning should be added just before cooking, otherwise the water they are stored in would just wash it away.
Mashed potatoes can be kept in the refrigerator for up to 5-7 days before they spoil.
They aren't grown.The potatoes used in them are grown,and then cut up and fried.
Roasting red potatoes works just as well as roasting any other type of potato.
Cut the potatoes into approx. 1 inch cube. If you do this they should only need to boil 15 minutes. If you have the pieces bigger, then it will take longer.