Heat oven to 375°F; line two sheets with parchment.

Mix oil, garlic, rosemary, thyme, salt, and pepper in small bowl; rest 5 minutes to blend flavors.

Arrange bread in one layer on sheets.

Generously pastry-brush oil mixture onto bread, distributing garlic and herbs on each slice.

Optionally sprinkle each with Parmesan.

Bake 10-12 minutes until golden with crisp edges; watch after 8 minutes to prevent burning.

Cool 5 minutes before serving. Make up to 2 days ahead; store airtight.