The delicious flavor from the leek goes well with cheese and ponzu. It's easily made in the microwave and goes perfectly with beer.
I like the combination of cheese and ponzu sauce, and when I tried it with leek, it was really tasty.
It's nice when the cheese has just melted. Add basil or other herbs if you like. You can also add ponzu sauce before you put it in the oven.
Enjoy Japanese food around the world.