Fish "On a Pillow"

On Saturday I was woke up by thunderstorm , and couldn't get back to full sleep after that. The gloomy and pouring day dawned upon Boston harbor. I dragged myself out of the bed, since this very Saturday, when it rained cats and dogs, and when the best would be to sit at home at the fireplace with a book and a glass of wine, we had to do some errands in Boston. Ugh! Well, I was exhausted by driving on rainy highways, and was thinking about something fast and easy for dinner. Amazingly, the muse of cooking suddenly drifted upon me. That's how this recipe was born, literally out of the blue.

What you need:
2 medium fillets of white fish (tilapia, trout, etc.)
2 celery stalks, sliced diagonally
2 yellow onions, sliced in rings
8 pearl onions, peeled & whole
Parsley, finely chopped
Dill, dried (or fresh, also chopped)
2-3 cloves garlic, minced
1 tbsp butter
Lemon juice
White pepper
Salt
1/2 cup water
1 red potato, peeled, cut in chunks

Method:
Rinse fillets in cold water and put on a plate lined with paper towels, sprinkle with salt and white pepper, generously.

I used red potato puree as a side dish. So  cover potato chunks with filtered water and put on medium heat. When soft, drain, reserve some liquid, mash; add salt and liquid for desired consistency.

Put garlic and butter  in a small pan on very low heat, stew  while the rest is cooking.

On the bottom of a large pan make "a pillow" of yellow onions, celery and parsley. Pour in 1/2 cup water, place whole fillets on the pillow,  arrange pearl onions between them, sprinkle with parsley and dill, and put the whole thing on medium heat. Steam fish  15-20 minutes, until cooked through.

When serving, sprinkle fish with lemon juice and drizzle with garlicky butter.

Notes:

More vegetables could (and should!) be added to "the pillow". I think diced zucchini will do well. The main thing is not to overdo the fish.

My observation tells me that simply cooked rice would probably make a better side dish, but red potato was also very good.

Fast, pretty simple (isn't it?), healthy. What about the taste? Arrange this fish as I said, take a bite - and you are in Heaven!