Mexican Layered Salad

Ingredients

• 4 cups torn romaine
• 1 medium red onion, thinly sliced, optional
• 1 large cucumber, halved and sliced
• 3 medium tomatoes, chopped
• 2 medium ripe avocados, peeled and sliced or cut into 1/2-in. pieces
• 1 each large green and sweet red pepper, chopped or sliced
• 1-1/2 cups mayonnaise
• 1/4 cup canned chopped green chiles
• 2 teaspoons chili powder
• 1/2 teaspoon onion powder
• 1/4 teaspoon salt
• 1/4 teaspoon garlic powder
• 1 cup crushed tortilla chips
• 1/2 cup shredded cheddar cheese