Boil the Maggi in a pan.
Now

Heat butter or oil in a pan. Add garlic, onion, and sauté till the onions are soft.

Next, add mix vegetables, and stir-fry on high flame till they are 90% cooked and they still have slight crispiness left.

After that add vinegar, soya sauce and mix it properly.

Now add Maggi masala mix it and cook it for 1 min

Add boiled Maggi and sauteed it for 2-3 mins.