Easy Tzatziki with Feta

Name: Easy Tzatziki with Feta
Ingredients: 2 (7-ounce) containers Greek yogurt, such as Fage Total; 1 hothouse cucumber, unpeeled; 1/4 cup sour cream; 2 tablespoons freshly squeezed lemon juice; 1 tablespoon white wine vinegar; 1 tablespoon minced fresh dill; 1 1/2 teaspoons minced garlic (2 cloves); Kosher salt and freshly ground black pepper; 1/2 pound feta, sliced; Good olive oil; Fresh thyme leaves; 1/2 pound large kalamata olives with pits; Toasted Pita Triangles, recipe follows; 1 loaf pita bread