any other veggies that cook well with peppers (onions

Onions (Allium cepa) are bulbous vegetables of the Amaryllidaceae family, native to central Asia and domesticated for thousands of years. The edible bulb consists of concentric layers of fleshy leaves wrapped around a central stem. Common varieties include yellow, white, and red onions, each with distinct flavor profiles ranging from sharp and pungent when raw to sweet and mellow when cooked. The characteristic pungency derives from volatile sulfur compounds (thiosulfates) that break down during cooking, creating complex caramelized flavors. Onions undergo significant biochemical transformation when heated—their natural sugars concentrate and undergo the Maillard reaction, producing deep umami notes and golden-brown coloration.

Onions serve as a foundational aromatic in nearly all savory cuisines, providing the flavor base (soffritto, mirepoix, or trinity) for countless dishes. They are sliced and caramelized as an accompaniment, pickled for condiments, diced raw into salsas and salads, or grilled whole. In pepper-based dishes—particularly soffritos, pipérades, Spanish tortillas, and stir-fries—onions complement peppers by providing sweetness and savory depth that balances the pepper's inherent brightness. Their ability to soften and merge flavors makes them ideal for building complex sauce foundations. Onions pair exceptionally well with both sweet and hot peppers across Mediterranean, Latin American, and Asian cuisines.