Brush outside top and bottom crusts of roll with oil.
Spread cut side of roll bottom with dijon-style mayonnaise; spread cut side of roll top with olive-oil mayonnaise.
Place onions on roll bottom; top with turkey and cheese. Cover with roll top.
Grill in heated panini grill 4 to 6 minutes or until golden brown on both sides and cheese is melted. Cut sandwich in half; serve with gravy for dipping.
Ingredients
1 (6-inch) French bread roll, horizontally cut in half