1. Process yolks, garlic, and mustard in a food processor until combined. With machine running, gradually add safflower oil, drop by drop, until emulsified. Add olive oil in a slow, steady stream until a thick mayonnaise forms. Season with salt and pepper. Mix in lemon juice and 2 teaspoons cold water. Transfer to a bowl. Serve at room temperature; do not leave unrefrigerated longer than 1 hour. Aioli can be refrigerated, covered, up to 2 days.