Meatball Chopped Salad

Name: Meatball Chopped Salad
Ingredients: 1 1/3 cups plain pita chips; 5 tablespoons red wine vinegar; 2 tablespoons extra-virgin olive oil; 1 small red onion, halved; 2 cloves garlic; 1/2 cup fresh flat-leaf parsley leaves; 12 ounces ground beef; 1/4 teaspoon ground cinnamon; Kosher salt and freshly ground black pepper; 1/4 cup 2 percent Greek yogurt; 1 cup grape tomatoes, halved; 1/2 cup crumbled feta; 2 hearts romaine lettuce, chopped; 1 small cucumber, quartered and cut into 1/2-inch-thick pieces; 1 yellow bell pepper, cut into 1/2-inch cubes