@Roberta,
The matzo meal and butter will work just fine.
If you've got any kind of herbs around, mince a bit into the matzo meal.
Dredge the fish.
Cook it in the butter. It won't take more than 3 - 4 minutes per side, unless it's a humungo brook trout.
Plain bread and butter, or a small pan of fried taters are all you need to make it just fine.
I like mine with a squoze or many of lemon when serving.
This time of year, a couple of fat slices of fresh stinky tomato with salt would make this a perfect meal.
Enjoy the brook trout.
(I'm envious, and that's in spite of having whole fried rainbow trout with lemon caper sauce on Thursday, and poached cod in ginger and green onion on Friday. Love me some fish.)