Avocado Caesar Green Beans

Bahan-bahan (4 porsi)

• half an avocado
• 1/4 cup mayonnaise
• 1/4 cup water (up to 1/2 cup)
• 1 large clove garlic
• 1/2 tablespoon Dijon mustard
• 2 tablespoons lemon juice
• 1/2 teaspoon salt
• 1 cup panko breadcrumbs
• 1/2 teaspoon garlic powder
• 2 tablespoons olive oil
• pinch of salt
• 12 ounces green beans, ends trimmed
• Parmesan for topping