First of all wash all vegetables and cut into slices.
Take a big pan.
Add half pan of water ,add 1/4 tsp salt and boil it.
When water boils ,add all vegetables and boil it for 5-6 min.then drain the vegetables. let the vegetable remain in the drainer so that the water drains properly.
Take a wok.
Add oil ,butter both together in it.
Add chopped garlic saute it for 4-5 min until it light brown.
Add salt ,black pepper ,chilly flakes ,oregano ,musturd sauce in it .
Mix well ,then add all vegetables and mix with soft hands .