Sourdough Focaccia with Onion and Sundried Tomato

Ingredients

• Dough
• 1-1/2 cups sourdough starter
• 3-1/2 to 4 cups bread flour
• 1 teaspoon salt
• 1 cup warm water (100? to 110F)
• 1 tablespoon olive oil
• Onion-Tomato Topping
• 2 tablespoons olive oil
• 2 medium (about 3 cups ) yellow onions, thinly sliced
• 1 teaspoon sweet basil
• 1 teaspoon leaf thyme
• 1/2 teaspoon black medium grind pepper
• 1/3 cup well drained, oil packed sundried tomatoes