Avocado Mayonnaise

Ingredients

• 1 egg yolk
• 1/2 teaspoon salt
• 1/4 teaspoon freshly ground black pepper
• 2 teaspoons dijon mustard
• 2 tablespoons lemon juice
• 3/4 cup olive oil
• 1 tablespoon boiling water
• 1 avocado peeled and pitted
• 2 tablespoons fresh lime juice
• 1/2 red onion small, minced
• 1/2 flat leaf parsley leaves only coarsely chopped