Vegetarian Potatoes au Gratin Recipe: How to Make It

Ingredients

• 3 medium carrots, thinly sliced
• 1 medium green pepper, chopped
• 4 tablespoons butter, divided
• 3 tablespoons all-purpose flour
• 1 teaspoon dried oregano
• 1/2 teaspoon salt
• 2-1/2 cups 2% milk
• 1 can (15 ounces) black beans, rinsed and drained
• 3 cups shredded Swiss cheese, divided
• 4 medium Yukon Gold potatoes, thinly sliced
• 1/2 cup seasoned bread crumbs