Loaded Cowboy Salad

Ingredients

• 1 (1-ounce) envelope dry ranch dressing mix
• 1 cup buttermilk
• 1 cup fat-free plain yogurt
• 1/2 (1.25-ounce) package taco seasoning mix
• 8 cups romaine lettuce, torn
• 2 jarred roasted red peppers, diced
• 1 (14-ounce) can black beans, rinsed and drained
• 1 (14-ounce) can white corn, drained
• 1/4 cup sweet onions, finely chopped
• 1 (4-ounce) can diced green chiles
• 1 cup Roma tomatoes, diced
• 1/2 cup sharp cheddar cheese, shredded
• 1 large avocado, sliced
• 1/4 cup fresh cilantro, optional, chopped, for garnish