Preheat oven to 425°F. In a very small saucepan, heat oil, garlic and coriander; season with salt and pepper. Cook over medium heat until garlic is golden, 2 to 3 minutes. Remove pan from heat and let stand for 5 minutes. Discard garlic.
Brush oil on rough sides of pitas; stack and cut each into 8 wedges. Place half of wedges oil side up on 2 baking sheets. Bake until golden, about 5 minutes. Repeat with remainder.