Crostini with Artichokes and Olives

Ingredients

• 6 whole artichokes in brine, very coarsely chopped
• 4 grape leaves in brine, stems removed, rinsed, and very coarsely chopped
• 1/2 cup imported green olives, such as picholine, pitted
• 1 garlic clove, minced
• 1/2 teaspoon grated lemon zest
• 11/2 tablespoons extra-virgin olive oil
• 1 tablespoon lemon juice
• Salt and freshly ground black pepper
• 1 long baguette, sliced on the diagonal into 16 1/2-inch slices, toasted or grilled