Rouille

Serve with grated Parmesan cheese and a rouille sauce [...].

ROUILLE SAUCE / Strongly flavored, served with fish soups or bouillabaisse.

Rouille: Garlic, Saffron, and Pepper Mayonnaise [...] After you have added a few drops of oil, add saffron and a pinch of cayenne. Gradually whisk in remaining oil in a slow, thin stream until sauce is thickened to a mayonnaise consistency. Taste the rouille and add additional cayenne, if desired.

In the Northwest one finds fritters coated with not-too-finely ground hazelnuts, with crab on the inside; in that case called crab cakes, spiked with chopped scallion and bell or hot red pepper, served with rouilles of mustard and racy mayonnaise.

Chicken bouillabaisse with Rouille [...] I'm taking some liberties by calling this recipe a bouillabaisse. The classic recipe, of course, is a venerable fish stew that originated in Marseille. It's flavored with saffron and garnished with a rouille sauce. [...] To serve, divide the bouillabaisse among 4 soup plates and top with the Rouille.