Coarse salt and freshly ground pepper, for sprinkling on top
Instructions
Twenty minutes before baking, preheat the oven to 425F, with an empty broiler tray on any shelf that won't interfere with the focaccia. The baking stone is not essential when using a cookie sheet; if you omit the stone, preheat can be as short as five minutes.
Grease a cookie sheet with a bit of olive oil or line with parchment paper or Silipat. Set aside. Dust the surface of the refrigerated dough with the flour and cut off a 1-pound (grapefruit sized) piece. Dust the piece with more flour and quickly shape it into a ball by stretching the surface of the dough around to the bottom on all four sides, rotating the ball a quarter-turn as you go.
Flatten it into a ½-3/4-inch-thick round, using your hands and/or a rolling pin and a minimal amount of flour. Place the round on a prepared cookie sheet.
Sprinkle with rosemary, coarse salt and freshly ground pepper. Finish with a light drizzle of remaining olive oil over the surface, about 1 teaspoon but not so much it starts dripping over the sides (as with the onion you won't cover the whole surface with oil).
Allow the focaccia to rest and rise for about 20 minutes.
After the focaccia has rested place the cookie sheet on a rack near the center of the oven. Pour 1 cup of hot tap water into the broiler tray and quickly close the oven door. Bake for about 25 minutes or until the crust is medium brown. Be careful not to burn the onions. The baking time will vary according to the focaccia's thickness. Because of the olive oil, focaccia will not develop a crackling crust.
Cut into wedges and serve warm.
Recipe by In Good Taste at http://ingoodtaste.kitchen/focaccia-onion-rosemary/