Preheat the grill to medium-low heat.
Combine the butter, herbs, pepper, lemon juice, and onions. Stir thoroughly.
Slice the bread in half long-ways to 2 create pieces. Cut eat piece into two, making 4 pieces.
Spread the butter mixture evenly over each piece.
Place the bread bottom side down (the un-buttered side) on the grill.Cover and cook for about 5 minutes or until the bottoms are golden brown. Flip the slices onto the buttered tops and continue to cook for an addition 5 minutes or until the tops are toasted to your liking.
Remove from the heat, slice and serve.