Lowering the pH of the potato helps fight off oxidation. Just like you squeeze a lemon on sliced apples, a bit of lemon juice or white vinegar in the bowl with the potatoes will ward of gray hues. Use the ratio of one teaspoon to a half gallon of water to get all the anti-browning impact with no notable flavor changes.

Can you keep parboiled potatoes in advance?

Tom Kerridge’s top tip… ‘Drain the boiled potatoes really well and leave them for a good long while afterwards to sit and cool. If you want to get ahead, why not boil them in advance, then toss in a little oil and store in the fridge until you’re ready to roast them.

How do you store parboiled potatoes overnight?

Simply parboil your potatoes, wrap them in an airtight container, and place them in the fridge as you would any leftovers. When you’re ready to finish cooking them, you’re ready to go with delicious potatoes every time that will cook much faster than if you started from scratch.