On a large piece of foil, drop three spoonfuls of butter and at least five slices of the onion and about 2 slices of lemon.
Place the trout on top of the onions, lemon, & butter, then sprinkle with salt, pepper, and a few sprigs of the fresh parsley, and fold the foil over to form a bag.
Try to seal the bag and make it as airtight as possible.
Bake in the oven for 45 minutes at 350 degrees.
When removing from the oven, cut a small hole into the bag, pour out the excess lemon-butter juice and use for garnishing, drizzling and tipping.
Makes the most flavorful, moist trout youve ever had.