1. Brush 4 slices bread with half of melted butter, and set butter side down on baking sheet.
2. Divide Camembert among bread slices on baking sheet. Top with tomato slices, then basil, and cover with remaining 4 slices bread. Brush sandwich tops with remaining melted butter.
3. Heat large skillet or griddle over medium-low heat. Cook sandwiches in skillet 4 minutes, or until browned and crisp. Flip, and cook 3 minutes more, or until second side is browned.