Pre-heat the oven at 425*F / 220*C.
Lay out the halved buns on a baking tray with white crumb side facing up.
Take a bowl and add all the chopped vegetables, spices and ketchup to it. Give all of them a good stir ad mix well. This is a quick Pizza topping.
Divide the vegetable pizza mix equally and top all the buns with the topping.
Now top these with the shredded cheese.
Bake these for about 6-8 minutes, till cheese is melted
Now Broil or Grill for about 30-45 seconds till cheese is slightly browned.
Take these out. Sprinkle with some chili flakes and Italian herb mix.
Serve them hot.