Sweating vegetables involves using a gentle heat to slowly soften them to draw out their deeper flavours.u003cbr/u003eu003cbr/u003eThere are 2 ways, with oil and steam-frying. Both need slow cooking without browning or caramelising.u003cbr/u003eu003cbr/u003ePlace the finely diced vegetables in a pan on a low heat with the lid on. Allow them to sweat/steam to bring out the moisture from the vegetables and release their flavours.u003cbr/u003e