In a large bowl, combine the vegetables, chicken, soup, milk, cheese, onions and seasoned salt. Transfer to a greased 13-in. x 9-in. baking dish. , Bake, uncovered, at 350° for 20 minutes. Meanwhile, separate crescent dough into two rectangles. Seal perforations; cut each rectangle lengthwise into four strips. Working quickly, weave strips over warm filling, forming a lattice crust. Bake 15 minutes longer or until crust is golden brown.