Eggplant Flatbread Pizzas

Ingredients

• 3 tablespoons olive oil, divided
• 2-1/2 cups cubed eggplant (1/2 inch)
• 1 small onion, halved and thinly sliced
• 1/2 teaspoon salt
• 1/8 teaspoon pepper
• 1 garlic clove, minced
• 2 naan flatbreads
• 1/2 cup part-skim ricotta cheese
• 1 teaspoon dried oregano
• 1/2 cup roasted garlic tomato sauce
• 1/2 cup loosely packed basil leaves
• 1 cup shredded part-skim mozzarella cheese
• 2 tablespoons grated Parmesan cheese
• Sliced fresh basil, optional