Heat butter in a pan.add wheat flour roast it little(it should not turn brown)add milk in it in batches and make white sause.there should be no lumps.

Add chopped spinach leaves and saute it

Boil corn

Add boiled corn in it

Now add black pepper salt and red chilli flakes in it

Fill the stuffing in sandwich

And roast it over tawa using butter

Enjoy delicious sandwich