Preheat the oven to 400°F
Pat the trout dry
Line a baking sheet or dish with parchment paper or lightly oil it
Place the trout on the prepared baking sheet
Season the trout with salt and pepper
Add lemon slices, garlic, herbs, or butter if desired
Drizzle with olive oil or melted butter
Bake for 12 to 15 minutes, depending on thickness
Check that the flesh flakes easily with a fork
Remove from the oven
Serve immediately