combine flour and salt in a large bowl add the shortening and rub into flour with your hands, until well blended add grapefruit soda, 1 tablespoon at a time, and toss with a fork continue to moisten and toss with a fork, just until dough holds shape wrap in plastic, chill rollout to a thickness of 0 cm press onto the bottom and up the sides of a tart pan line with foil and fill with beans, rice, or other pie weights bake @ 200ºC or 10 minutes, remove foil bake @ 400 degrees, until golden fill as desired ----