Smoked Salmon Pizza

Name: Smoked Salmon Pizza
Ingredients: 4 pita bread, quartered; olive oil, for brushing; 1 cup low-fat sour cream; 400 g smoked salmon, slices; 70 g baby spinach leaves; 1⁄4 cup fresh chives, chopped; 1⁄4 cup fresh dill, chopped; 1⁄4 cup baby capers, rinsed and drained; 1⁄4 cup kalamata olive, halved; 1 red onion, thinly sliced