For the dough, follow the same process as for the sponge. Add the sponge before kneading;
knead for 4-5 minutes. Add additional flour if dough is sticky. Lightly oil a large baking sheet, such as a jelly roll pan. Place the dough on the sheet and, using your fingers, push out to a 15 x 12-inch rectangle. Cover loosely with plastic wrap and let double in volume, about 45 minutes.
While the dough is rising, heat oil in skillet over medium-low heat. Add garlic and sauté just until softened, but not browned. Remove from heat and cool.
To bake, preheat oven to 400° F. Brush the top of the dough with the oil and garlic. Sprinkle with the rosemary and salt. Make small indentions all over the dough with your finger. Bake for 20-25 minutes or until a golden color. Cool for 5-10 minutes on racks, then remove bread from the pan. Bread may be served warm, cut into desired pieces, or cooled completely.
Notes: Focaccia may be topped with any variety of seasonings, pastes and even cooked vegetables such as onions or tomatoes. Use your imagination. It is also excellent sliced in half horizontally and used as sandwich bread.