Thaw fish if frozen. Rinse fish; pat dry with paper towels. Remove the heads of the trout if desired. Rub both sides of the fish lightly with the olive oil. Lay fish flesh-side up and sprinkle with the salt and pepper; set aside.
Cut one of the lemons in half lengthwise, then cut each half into thin slices. Cut remaining lemon into wedges; set aside.
In a small bowl stir together the snipped or dried herbs and the garlic. Sprinkle the flesh-side of each fish with the herb mixture. Arrange the lemon slices evenly on half of each side of the fish. Arrange herb sprigs over lemon slices. Squeeze one of the lemon wedges over fish. Fold unfilled side of fish over lemon slices and herbs.