Combine vegetables and Italian dressing, tossing well. Spoon vegetable mixture onto a large baking sheet. Bake at 450° for 20 minutes or until vegetables are lightly browned, stirring once. Remove from oven. Reduce oven temperature to 375°. Combine roasted vegetable mixture, spaghetti sauce, and kidney beans, stirring well. Spoon vegetable mixture into a 13- x 9- x 2-inch baking dish.
Unroll dough onto a work surface; sprinkle dough with fennel seeds. Roll dough to a 14- x 10-inch rectangle; place over vegetable mixture. Bake at 375° for 30 minutes or until lightly browned.