Never mind the name, these sweet, nutty squash are harvested in the fall. They are called "winter" because their hard shells allow them to be stored for extended periods, and in the days before refrigeration, that was a quality more worth honoring than mere harvest seasonality. The earliest winter squash are just beginning to trickle into the market -- kabocha, butternut and acorn, mostly.
Right now they are still fairly small, and most will be a little short on flavor. But within the next week or two that will change, particularly for squash such as butternut and kabocha. These benefit from a couple of weeks of "curing" after being harvested, which allows time for enzymes to convert some of their starch into sugar. Acorns are from another family and do not require curing. They're better bets this early in the season. When choosing squash, look for hard, corky stems and deep, vibrant color. Many squash will show pale spots where they rested on the ground, just like some melons do. Squash can be prepared in different ways, depending on what kind of flavor and texture you want. Cut them in half and roast them (about an hour at 400 degrees) and they are caramelized, sweet and creamy. Or cube them and steam them (about 20 minutes) and they'll be milder and more squash-like with a texture that is moist and slightly grainy.
How to choose: Look for squash with deep, saturated colors and no soft spots or cracks. The stem should be hard and corky too.
How to store: Keep winter squash in a cool, dark place. You don't need to refrigerate them.
How to prepare: Here's a recipe for happiness during the coming rainy season: Hack off a chunk of winter squash and remove the seeds; place it cut-side down in a pan with just a little water, and roast it at 400 degrees until the whole thing collapses into a sweet, fragrant, slightly caramelized puree.
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