Tough economic times, and a backyard renovation that's escalating in cost every second or so, are making me rethink my shopping budget. In winter it's easy to cook cheap and easy meals - as I do so love slow-cooked cheap cuts. However, in summer I spend most of my time firing up the bbq, and I've yet to work out an alternative to salmon or thick, organic steaks. Stir-fries perhaps? What's your best frugal tip for the food world?