Tapas-Style Turkey Meatballs - Ellie Krieger

Ingredients

• 1 pound ground turkey, all dark meat or a mix of light and dark (92 or 93 percent lean)
• 1/3 cup dried whole-grain bread crumbs
• 1 small onion, half of it minced and half of it cut into small dice
• 4 cloves garlic, minced
• 1 large egg, lightly beaten
• 2 tablespoons finely chopped fresh flat-leaf parsley
• 1 1/4 teaspoons Spanish smoked paprika (sweet; pimenton)
• 1 teaspoon salt
• 1/4 teaspoon freshly ground black pepper
• 3 tablespoons extra-virgin olive oil
• 15 ounces canned, no-salt-added tomato sauce
• 2 teaspoons sherry vinegar
• Pinch cayenne pepper, or more as needed
• Water