Avocado-Cashew Salad

Ingredients

• 2 tablespoons olive oil
• 1 tablespoon lemon juice
• 1/4 teaspoon garlic powder
• 1/2 teaspoon black pepper
• 1/4 teaspoon salt
• 1 medium ripe tomato, large dice
• 1/2 cup red onion, large dice
• 1 cup broccoli florets, blanched
• 2 heads (about 3 cups) Bibb lettuce
• 1/8 cup mayonnaise
• 1 large ripe avocado
• 3/4 cup cashews, more if you like