Slow-Cooker Spanish Meatballs

In a large bowl, combine pork, 1/4 cup onion, cumin, 1/2 teaspoon paprika, breadcrumbs, eggs, and parsley. Season with salt and pepper. With a wooden spoon, gently mix to combine and, using your hands, roll into 25 meatballs(each 1 1/2 inches wide.)

In a large nonstick skillet, heat 1 1/2 tablespoons oil or medium high. In two batches, brown meatballs on all sides, 8 minutes per batch. Transfer meatballs to a 5- to 6-quart slow cooker. Add remaining onion to skillet, cook until fragrant, 2 minutes. Transfer onion to slow cooker, along with 1 teaspoon paprika and tomatoes. Season with salt and pepper. Cook on low until meatballs are tender, 5 hours. Serve with rustic bread if desired. (Cooked meatballs can be frozen up to 2 weeks; let cool completely, then transfer to airtight containers.)