Firstly, in a large vessel add butter and saute garlic.,also saute maida,furthermore, add milk in 3 batches and whisk 2-3 times,continue to whisk till a thick paste is formed.further, add pepper, red chilli flakes and salt.mix well and get the sauce to a boil and keep aside.

Firstly, in a large pan heat butter and saute onions.

also saute vegetables.

then add prepared white sauce and saute well.also add little water.
further, add boiled pasta

Then season with salt and pepper,give a good mix and add basil leaves, chilli flakes.further mix and transfer to a serving bowl.finally grate parmesan cheese and serve.