Ocado Brown Onions. These onions have a firm feel and a bright, brown outer skin. Their versatility makes them a staple ingredient in many dishes, adding a rich, sweet depth of flavour to soups, stews, and sauces. They can also be caramelised for a delicious addition to burgers, sandwiches, and pizzas or can be fried until golden brown. Top Tip! To caramelise onions, slice thinly and cook slowly in a pan with a little oil and a pinch of salt until they turn a deep golden brown. Add a splash of balsamic vinegar or red wine for extra flavour. Whether it's red or brown, fresh or frozen, we've got the perfect onions for you, simply search for 'Ocado onions'.