Baked Basque Potatoes

Ingredients

• 6 cups (1-inch) cubed peeled potato (about 2 pounds)
• 1 (16-ounce) can fat-free, less-sodium chicken broth
• 4 teaspoons olive oil, divided
• 2 cups coarsely chopped onion
• 2 cups coarsely chopped green bell pepper
• 1/2 cup coarsely chopped red bell pepper
• 1/2 teaspoon salt
• 2 garlic cloves, minced
• 2 tablespoons paprika
• 3 tablespoons sherry vinegar or red wine vinegar
• 1 tablespoon chopped fresh or 1 teaspoon dried tarragon
• Cooking spray
• 1/4 cup dry breadcrumbs
• 1/4 cup (1 ounce) grated fresh Parmesan cheese