Preheat the oven to 400F.
Spread the shrimp in a single layer on a baking sheet.
Chop the fresh herbs, if using fresh herbs.
Slice 2/3 of the lemon, reserving the last third of the lemon for juicing. Seed the slices.
Sprinkle the shrimp with the garlic. Layer the lemon slices on top, then sprinkle everything with the herbs.
Cut the butter into small pats and place them all over the shrimp.
Bake at 400F for 12-15 minutes, until the shrimp are pink and cooked through.
Remove the lemon slices from atop the shrimp and place them on a platter or in a large bowl. Drizzle with the butter in the pan. Sprinkle with salt and pepper.
Finally, add some fresh chopped parsley if you'd like. Mix.
Serve warm with bread.