2. In a 9-by-13-inch pan, mix onion, chorizo, garlic, oil, salt, and pepper. Place on middle rack and roast for 15 minutes. Add bread, stir well, and roast another 5 minutes. Add broth, stir well, and continue roasting for another 20 minutes. Garlic should be tender and mash easily with the back of a spoon. Remove from oven and taste for seasoning. If there are any larger pieces of bread, mash them up slightly using the back of the spoon.