Using poor potatoes can result in an equally poor-tasting dish. Start off by picking potatoes that are ripe and healthy. Here's how to identify them:
Firm — The best potatoes are firm when you squeeze them. Soft potatoes are old and possibly going bad, so either don't buy them or make sure to eat them straight away.
Smooth — If the potatoes are wrinkly, this could indicate a loss of moisture (and nobody likes dry potatoes!)
Color — Avoid potatoes with green skin. This is an indication the potato has been exposed to sunlight and may contain a toxin called solanine, which can cause gastrointestinal problems.
Blemishes, Bruises and Sprouts — Make sure to cut these away before cooking.