When Joan Sills told me her friend Gail and daughter Lily were visiting colleges from Walnut Creek, California, I knew I had to show them some Eastern hospitality. Joan, Mary, and the visitors dined well after viewing Brown, Yale, Amherst, and other colleges. The menu: smoked salmon, spinach balls, parsnip soup, crab cakes with avocado puree, salad, fingerling potatoes, racks of lamb with mustard glaze, Chocolate temptation cake.