Chicken Tinga Tostadas - Azteca

Ingredients

• 1 box Azteca® Salad Shells
• 1 pound chicken breast, cooked and shredded
• 5 Roma tomatoes, chopped with seeds and skin
• 1 can refried beans
• 2 tablespoons corn oil
• 4 medium white onions, sliced
• 2 tablespoons brown sugar
• 2 tablespoons canned puree chipotles
• 1 teaspoon oregano
• 2 tablespoons cilantro, chopped
• Salt
• freshly ground black pepper
• Romaine lettuce, shredded
• Queso Fresco, crumbled, for serving
• Sour cream, for serving