Cook onion and sweet pepper in margarine or butter in a skillet until vegetables are tender. Stir in Italian seasoning and crushed pepper.
Spread each tortilla with about 1 tablespoon of the pizza sauce, spreading sauce to about 1/2 inch from edges (reserve remaining sauce). Divide onion-pepper mixture among the tortillas, spooning it evenly atop the sauce. Sprinkle the pizza cheese evenly over the onion-pepper mixture, leaving a 1/2-inch border around the edges.
Roll up tortillas from one side and place on a foil-lined baking sheet with seam sides down. Brush lightly with a little cooking oil. Sprinkle with the Parmesan cheese.
Bake in a 400 degree F oven about 8 minutes or until cheese is melted. Meanwhile, heat remaining pizza sauce in a small saucepan. To serve, use a sharp knife to cut each tortilla roll into four pieces. Serve warm with the heated pizza sauce for dipping. Makes 24 appetizers.