Cook frozen broccoli spears according to package directions drain well
Meanwhile in a small bowl beat egg whites and salt with a rotary beater until stiff peaks form
Gently fold in mayonnaise or salad dressing set aside
Arrange cooked broccoli spears with stem ends toward center on oven-proof platter or 9-inch pie plate
Drizzle the melted butter over broccoli spears Spoon the mayonnaise mixture into the center of the platter over broccoli stems sprinkle with grated Parmesan cheese
Bake in a 350 oven for 12 to 15 minutes or until topping is golden