1Heat oven as directed on cornbread mix pouch. Make cornbread as directed on pouch, using milk, melted butter and egg. Cut one-fourth of cornbread into cubes; place on ungreased cookie sheet. Toss with 1 tablespoon canola oil. Bake 10 minutes or until edges are browned. Remove from cookie sheet to bowl.
2Meanwhile, in blender, place all Vinaigrette ingredients except salt and pepper. Cover; blend well. Stir in salt and pepper to taste.
3In 4 (8-oz) jars, layer Salad ingredients starting with mixed salad greens. Top each salad with 2 tablespoons Vinaigrette. Cover jars with lids; shake. Remove lids; top each with cornbread croutons. Cover jars again. Serve salads with slices of remaining cornbread.