Preheat oven to 350 degrees. Line a baking sheet with a Silpat baking mat; set aside. In a small bowl, combine parsley, thyme, rosemary, salt, pepper, and oil.
Spread bread slices with garlic, then brush with herb mixture. Place in a single layer on prepared baking sheet, and bake until crisp and edges are beginning to brown, 10 to 12 minutes.