FOOD FACTS Spring Fever THIS WEEK'S Out-of-doors the buds are bursting and the birds are sing- ing, but may be you and the family don't feel so gay. Are you list- less and a little out of sorts? Spring Fever is the trouble, but you'll get over it if you pay special attention to your diet for the next few weeks. Don't give your family heavy, starchy meals just now. Plan dishes of blood- cleansing vegetables, raw and cooked, containing Vitamin C, a valuable tonic. Here are some recipes you might like to greet the spring with: POTATO AND WATERCRESS SOUP Time: Preparation 10 mins.