Take a mixing bowl. Add thick yogurt and whisk it very well. Add red chili powder, turmeric powder, garam masala, tandoori masala, cumin-coriander seeds powder, black salt, kasuri methi, pinch of Hing and salt. Mix all these ingredients properly.
Add grated ginger and lemon juice, mix it again and make a smooth paste.
Add paneer cubes, diced mixed peppers and diced onion into the yogurt mixture and mix it well and keep aside for 10minutes (All veggies should be coated properly).
Take a wooden or metal skewers. Now insert the prepared or coated veggies as per your choice. You could refer the pics for how I arranged it.