Slow Cooker Spinach-and-Parmesan Meatballs
INGREDIENTS 1 (24-ounce) jar marinara 3 tbsp. grated Parmesan, plus more for serving 3 tbsp. panko breadcrumbs 1/3 c. chopped fresh flat-leaf parsley 2 cloves garlic, pressed Kosher salt and freshly ground black pepper 1/2 lb. sweet Italian sausage, casings removed 1/2 lb. ground beef 1 c. baby spinach, chopped DIRECTIONS 1. Pour marinara into a 5- or 6- quart slow cooker. Line …