Makes 12 to 14 servings.
1 (1/4 ounce) envelope active dry yeast
1 2/3 cups warm water (100ºF to 110ºF)
4 1/2 cups bread flour
1 1/2 tablespoons kosher salt
3/4 cup olive oil, divided
2 tablespoons chopped fresh thyme
1 tablespoon chopped fresh rosemary
1 pound Welch’s® Fresh grapes, halved
Freshly ground black pepper
Garnishes: chopped fresh rosemary, fresh thyme leaves (optional)
Stir together yeast and warm water (100ºF to 110ºF) in bowl of a heavy-duty electric stand mixer; let stand 5 minutes. Add bread flour, salt, and 1/4 cup oil to yeast mixture; beat on low speed, using paddle attachment, 25 seconds or until blended. Add chopped herbs. Switch to dough hook; increase speed to medium-high, and beat 5 minutes. (Dough will be sticky.)
Place dough in a large, well-greased bowl, turning to coat top. Cover with plastic wrap and let rise in a warm place (80ºF to 85ºF), free from drafts, 1 hour or until doubled in bulk.
Drizzle 1/4 cup olive oil in half-sheet pan or jelly-roll pan; place dough in pan. Press dough down and into edges of pan, using your fingers. (It’s okay if there are holes in the dough.) Cover with plastic wrap and let rise in warm place for 1 hour.
Preheat oven to 425ºF. Scatter grapes over dough. Drizzle with remaining 1/4 cup olive oil and sprinkle with coarse salt and freshly ground black pepper. Bake 30 to 35 minutes or until golden brown. Serve warm or at room temperature.