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One of My Potatoes is Solid as a Rock and Won't Cook

My husband just brought home a handful of the first baby potatoes and one of them is as solid as a rock and won't cook. What caused this?
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I Left My Frozen French Fries Out, Can I Still Safely Eat Them?

I accidentally left a bag of frozen French fries out for three hours before I realized it. I put the bag back in the freezer, but was wondering if it still safe to use next time?
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Can I Eat Potatoes with Black Spots?

I’m used to cutting the black spots off a potato, however, if I boil them with the skins on and mash them with the skins, I won’t know if there are black spots. Are they OK to eat?
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How Do I Safely Prepare Potatoes Off-Site and Transport to an Event?

I am catering a dinner for my cousin and need to prepare roasted red skin potatoes and hold those potatoes for 6+ hours. I have nowhere to cook on sight for this event, so I need to prepare and cook off site and transport in my catering warmers. How do I keep the prepared potatoes from oxidizing and turning black?
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My Mashed Potatoes Were Left Out Overnight, Can I Still Eat Them?

My instant mashed potatoes were left out overnight with no eggs, butter or cream (just water). Can I still eat these or should I throw them away?
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Should I Soak My Fresh-cut French Fries in Salt Before Frying?

What kind of salt, Kosher or Sea salt, should I use to soak my fresh-cut French fries in before frying?
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My Potatoes Have Started to Sprout, Can I Plant Them in My Garden and Grow My Own?

I have a bag of potatoes, grown in Idaho, and the "eyes" are starting to sprout. I live in Massachusetts and would like to grow my own potatoes in my garden. If I cut the potatoes up and plant them, will new potatoes grow?
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Can I Use Frozen Diced Potatoes in Potato Salad?

Can I use frozen (then thawed) diced potatoes in potato salad?
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Do I Need to Wash My Potatoes with Soap?

Last night, I washed our bakers, scrubbed them with a vegetable brush and water, and then plopped them into dish soap and water bath for 20 seconds. This was at advice of a doctor video I saw two days ago. Then, this morning, I read not to use anything but water, What do you recommend?
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Are Potatoes Safe to Eat During the COVID-19 Outbreak?

With the spread of the coronavirus (COVID-19) around the world, I want to know that the food I eat is safe and doesn't pose a risk of infection. Am I okay to eat fresh potatoes that I buy from the grocery store? Should I keep my potatoes in quarantine for 14 days after purchase? Finally, do I need to wash the potatoes with soap or will water do?
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