The effects of the economic downturn on the expenditure of British households is resulting in a rise in sales of basic ingredients at the nations supermarkets, it has emerged.Foodstuffs such as onions have seen sharp rises in demand, according to the Times.Leading supermarket chain Tesco has reported an 80 per cent increase in the vegetable, with other supermarkets seeing ten to 15 per cent rises.Garlic has also become more popular, with anywhere between an 11 to 29 per cent spikes in sales.Robert Oldenshaw, an onion grower from Lincolnshire and spokesman for the British Onion Producers Association, told the paper Things are going really well.Our market research suggests it is going to stay like this for some time.With plenty more fresh basic ingredients with which to prepare meals for the family, the contemporary kitchen now has even more need for a well-designed and durable sink, such as a model from the Franke sinks range.