Spícy Roasted Vegetable and Tuna Canapés

Here, earthy caramelized vegetables, chunks of oil-packed tuna, tiny cubes of Gruyère-type cheese, and pitted chopped olives are mixed and piled on a small baguette slice. It’s the treatment of the bread slice that makes this dish so special. First it’s dipped on one side only in a spicy liquid; only then is the well-blended topping added.

The best rendition of this Tunisian dish occurs when the cook allows all the roasted chopped vegetables to drain overnight. This slow draining cr