BEST CHICKEN ENCHILADAS EVER!!!!

I. PREP: 

• 15 MINS COOK: 
• 45 MINS TOTAL: 
• 1 HOUR

II. INGREDIENTS:

• 2 Tablespoons vegetable oil
• 1 small white onion, peeled and diced
• 1.5 pounds boneless skinless chicken breasts, diced into small 1/2-inch pieces (*or see substitution using pre-cooked shredded chicken)
• salt and pepper
• 1 (4 ounce) can diced green chiles
• 1 (15.5 ounce) can black beans or lentils, rinsed and drained
• 8-10 flour tortillas
• 3 cups Mexican-blend shredded cheese
• 1 batch red enchilada sauce, or 1 can store-bought enchilada sauce
• (optional: 1/4 cup chopped fresh cilantro)