Rouille

Directions

1. 1
   Place vinegar in a very small pan over medium-low heat.
2. 2
   When vinegar is hot, remove pan from heat and add saffron.
3. 3
   Steep 20 minutes.
4. 4
   Add lemon juice; mix well.
5. 5
   Place egg yolk in a deep, medium mixing bowl.
6. 6
   With a large whisk, beat about 15 seconds.
7. 7
   Add the saffron mixture, salt and garlic, and whisk 30 seconds.
8. 8
   Then, whisking vigorously, slowly add the oil in a thin stream.
9. 9
   Whisk until the sauce is very thick.
10. 10
    Adjust seasonings.
11. 11
    Transfer to a bowl, cover and refrigerate until ready to serve.