How to cook gratin

I learnd how to cook gratin from Hu-mama.

Hu-mama is my mother-in-low.

We call her Hu-mama(mama means mom)

Because it's too young to call her grandma,so we call her mom.

We live with her.

She cooks nice meal everyday.

She has been living with us since March this year.

She taught me how to cook gratin.

When she cookes it before,it tasted wounderful!!

So I wanted to learn.

First,we cut some vegetables and meat into small pieces.

Then,we saute the onions with butter in a frying pan until tender.

We put a cup of flour into the pan little by little with a strainer.

And then,pour a cup of water .

She says a key here is to use water instead of milk to prevent lumps.

After adding two bottles of milk into it,then add cooked potatoes,macaroni and meat.

We cook over low heat until boiling.

Then,remove from heat,and turn the ingredient into the baking dishes.

We put shredded cheese and sprinkle some bread crumbs on top of gratin.

Finally,we bake in the oven for about 15minutes at 230℃.

That's all!!