asparagus and santons — Les Petites Gourmettes

Ingredients

• 1 tablespoon mayonnaise
• 1 tablespoon Dijon mustard
• 1 tablespoon white wine vinegar
• 3/4 cup extra-virgin olive oil
• 1 tablespoon minced fresh tarragon
• Salt and freshly ground black pepper
• 1 tablespoon olive oil
• 1 large onion, peeled and diced
• 1/2 teaspoon sugar
• 3 garlic cloves, peeled and minced
• 2 pounds thick asparagus, ends broken off and peeled
• 6 large eggs