Preheat oven to 425 degrees. Saute onions and green peppers in hot oil, until tender. Open pizza crusts into rectangles on different rimmed cookie sheets. Spread with mayonnaise; top with sauteed vegetables, beef and cheese. Wrap crust around filling, pinching to seal on ends and along seam. Bake 14 to 17 minutes, until golden brown. Double recipe for two Stromboli's if needed. Serve chips, carrots and dressing on the side.