Vegetable Tuna Pockets

Ingredients

• 1 (6-ounce) can low-sodium, low-fat chunk white tuna in spring water, drained
• 1 (14-ounce) can artichoke hearts, drained and coarsely chopped
• 1/2 cup seeded, finely chopped cucumber (about 1/2 small)
• 1/2 cup seeded, finely chopped tomato (about 1/2 medium)
• 1/4 cup plus 2 tablespoons fat-free Caesar salad dressing, divided
• 2 (8-inch) pita bread rounds, cut in half crosswise
• 3/4 cup shredded iceberg lettuce
• 2 tablespoons sliced ripe olives