This time of year you'll find a glorious profusion of peppers at farmers markets — plump, sweet bell peppers; tiny, fiery chile peppers; and assorted oblong peppers, with flavors that fall somewhere in between.
There are just too many kinds of hot and sweet peppers to describe in one story. Bell peppers in shades of red, orange, yellow, brown, black, striped and white are reliably sweet, while the flavors of chiles can be a toss-up from warm to searingly hot. The exact level of heat often is anyone's guess, so if I'm unsure, I always ask the farmer who grew them.
The word for "pepper" — whether in Asian, African or European languages — is derived from the existing term for black pepper, one of the earliest known spices. But chile peppers are a gift of the New World to the Old World. The spice that set Christopher Columbus off to the East Indies ended in vain. Instead, he returned with a handful of chile pepper varieties that are now the most widely cultivated throughout the world, with hundreds of varieties available.
The heat in chiles comes from capsaicin, a naturally occurring substance that is not actually a taste but a compound that triggers heat receptors and tricks our brain into thinking we're overheating. Chile pepper plants most likely evolved to protect keep animals and fungus away. Credit the Hungarians for breeding peppers without capsaicin into the bell peppers we know today. Although enjoyed as a vegetable, all peppers, like tomatoes, are categorized as fruit and are best kept unwashed on the counter until ready to use. Cold spoils their flavor and texture.
Brightly colored, glossy and firm, those colorful bells are ripened green peppers. Green peppers can taste grassy and lack the sweet spunk of the mature varieties. For chiles, be warned that the smaller the pepper, the bigger the punch. One of the most distinctive chile varieties, developed in the Old World, is named for the city of Aleppo where it was first grown. Its flavor is deep and earthy, with just enough spice to be complex and pleasantly warm.
Faced with so many local choices, I like to mix chiles and bells in the same dish. Bell peppers make a classic container for a stuffing of ground turkey, chicken, beef, pork, lamb or cooked dried beans or grains sparked with chiles and topped with melty cheese. The basic recipe may be scaled up to feed a hungry crowd or turned into a pretty dinner for two.
While many stuffed pepper recipes call for the peppers to be blanched in advance or stuffed raw and then cooked longer, they're actually best when roasted first to soften them up before stuffing to finish the dish. The first roasting lightly caramelizes the peppers and the second ensures it will be tender but not to the point of falling apart. Stuffed peppers are a perfect use for last night's leftovers. You can prepare the whole dish ahead and hold it covered in the refrigerator to have at the ready.
Sweet and hot, peppers give spice and substance to our summery meals.