Heat the oven to 375°. In a small bowl, stir together olive oil, garlic powder, and salt.
Place bread on a cutting board and cut it into 3/4-inch squares. Put the bread in a ziplock bag, add the oil mixture, then seal and shake the bag to coat the bread.
Spread the pieces out on a rimmed baking sheet and bake until they're just starting to brown, about 5 minutes. Use tongs to flip them, then return them to the oven and bake until deeply browned and crisp, about 5 minutes more.
