Recipe: Sweet Potato Gratin with Caramelized Onions (2024)

FAQs

Can I store sweet potatoes and onions together? ›

What you don't want is to have your potatoes and onions in close proximity, as gases from the onions can hasten sprouting in potatoes. Kept in the dark: Davison says your potatoes should be stored inside a paper bag in a cool, dark, dry place. And as mentioned above, away from onions and their sprout-encouraging gases.

(Another hot tip if you're boiling your sweet potatoes: Don't overcook them! They tend to absorb water, which could make the filling watery.) So, say you do have some undercooked bits of sweet potato. You have two choices: Pick them out or bake your sweet potato casserole long enough to soften the underdone pieces.

But, here's the catch: Storing potatoes and onions together will drastically shorten their shelf life. The reason? Onions produce ethylene gas, a gas that causes potatoes to spoil prematurely. Conversely, potatoes' high moisture content can cause onions to turn brown and mushy.

1. Metal Potato Bin - This kitchen storage tin is made of high quality powder-coated sheet steel, the potato storage container is durable and heavy, so your vegetables will be well protected.

Browning butter packs in tons of flavor, without dulling the sweet potatoes. Slow-roasting the sweet potatoes activates endogenous enzymes that bring out their natural sweetness. A touch of maple syrup, butter, and a bit of chopped thyme are the only embellishments these naturally sweet sweet potatoes need.

Some recipes for homemade sweet potato fries ask you to soak the fries before cooking. The theory is that soaking draws out starch from inside the potatoes, helping them crisp up.

Because of their fiber and vitamin contents, sweet potatoes are often considered the healthier choice between the two. Sweet potatoes are likely healthier than regular potatoes. They have a lower GI, more fiber, and large amounts of beta carotene.

How to tell if sweet potatoes have gone bad. If your sweet potato is soft in spots, smells rotten, or oozes a mysterious liquid, that potato should be discarded. Another sign that sweet potatoes have taken a turn for the worse is if they start growing stalky purplish sprouts.

The ooze is actually referred to as "sap." It is made up of sugar and starch combined with the moisture found in the vegetable, and it escapes out of the damage made from the knife. The sap really equals the sweetness. If it's pouring out of your potato, that means it's a sweet and delicious vegetable.

Why put egg in sweet potato casserole? ›

The egg is the all-important binder in a sweet potato casserole: it enriches and stiffens the mixture without making it heavy. Make sure to cool the mash slightly before adding the egg so it doesn't scramble, and to stir well so there are no streaks of cooked egg white in the finished dish.

Boil the sweet potatoes in a large stockpot until soft, about 25 minutes; drain. When cool enough to handle, peel the potatoes and transfer them to a large bowl. While the potatoes are still warm, add the butter, cream, agave, cinnamon and salt, and mash until smooth. Sprinkle with the orange zest.

Pierce potatoes all over with the tines of a fork and bake in oven, directly on rack, until soft and caramelizing, 1 1/2 hours. Slash the tops of potatoes open with the tip of a sharp knife and push ends of each potato toward each other to open. Divide butter, salt, and pepper among potatoes and serve.

If I'm planning to, I rub the sweet potatoes in a small amount of olive oil before baking to crisp them up and add extra flavor. After baking, let the potatoes cool slightly, split the tops open, and dot with butter that will melt from the residual heat. Season with a little salt and pepper, and you're ready to go.

Sweet potatoes prefer slightly different conditions that white potatoes. Around 55 to 60 degrees Fahrenheit with some humidity is best. They'll still require a dark place away from other fruits and vegetables, except maybe an apple.

It's not just potatoes you need to worry about. Other produce that releases ethylene gas, such as apples, citrus, and bananas, will accelerate an onion's degradation, as will moisture-rich fruits such as melons and cucumbers, says Alibrandi. An onion's absorbent nature also means it easily picks up smells.

Store in a Cool, Dry Place

For this reason, he says it's best to store onions in a cool, dry place like a cellar, pantry, or even a garage. While they can be stored whole in the fridge, Yee notes that this causes the onion to convert starch to sugar, and can result in soft or soggy onions.

“The easiest rule to follow is to just store like produce together,” Grant-Vose says. “Berries can be stored together, brassica vegetables can be stored together, leafy greens can be together, and most root vegetables (except potatoes) can go together.”