I grew up eating steamed fish with ginger and scallions my whole life. It's one of the easiest and inexpensive things to makes. Packs a ton of flavor and something Chinese people would eat all the time.
I usually use striped bass or tilapia. The butcher normally cleans out the fish as well as descaling them. It's super awesome. I stuff the fish with green onions and ginger slices. The exterior gets a few scoring on both sides. A drizzle of olive oil and seasoned soy sauce is poured on which helps season the fish. I don't have a large steamer for this, so I baked it on 300 for 45 minutes (wrapped). I didn't want the heat too high to dry out the fish. At the end, a drizzle of a little more seasoned soy sauce with about 1/4 cup of hot oil is poured on top. Extra ginger and sliced scallions are layered on for more flavor. Delicious with a big bowl of white rice. I eat this about once a week with a side of veggies.
