Slow Cooker Italian Wedding Meatball Sandwich

Steps

1. 1

   Mix meatball base

   • In a large bowl, combine the ground pork, ground beef, chopped spinach, grated Pecorino Romano, panko breadcrumbs, beaten egg, minced garlic, dried oregano, dried basil, salt, and black pepper.
   • Mix gently with your hands until just combined—do not overmix, as this toughens the meatballs.
   • The mixture should come together when pressed but still feel loose and tender.

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   Ready when: Mixture is evenly combined and holds together when squeezed

   Tip: Keep your hands cool by running them under cold water before mixing; this prevents the fat from smearing into the meat and keeps the texture light and tender.

2. 2

   Shape and cook meatballs

   • Using a 2-tablespoon (30 ml) ice cream scoop or two spoons, form the mixture into 12 evenly-sized balls and place them on a shallow baking sheet or dish.
   • Do not pack them too densely.
   • Heat a large skillet over medium-high heat.
   • Working in batches if needed, add meatballs in a single layer and sear for 3–4 minutes, turning gently with a spoon every 30–40 seconds, until they are browned on all sides but still slightly raw inside (they will finish cooking in the slow cooker).
   • Transfer to a clean plate.

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   Ready when: Meatballs are golden-brown on all sides, centers are still slightly raw

   Tip: Don't skip the sear—browning develops flavor through the Maillard reaction and keeps the meatballs from becoming mushy in the slow cooker. Use a light hand when turning them so they don't fall apart.

3. 3

   Build slow cooker sauce

   • Pour the marinara sauce and beef broth into your 4-quart slow cooker and stir to combine.
   • Add the smashed garlic cloves and red pepper flakes if using.
   • Stir well.

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   Ready when: Sauce is well combined

4. 4

   Add meatballs to slow cooker

   • Gently nestle the seared meatballs into the sauce.
   • They should be mostly submerged.
   • Cover with the lid and set to low for 4 hours, or on high for 2 hours.
   • Stir very gently once or twice during cooking to ensure even heat distribution, being careful not to break the meatballs.

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   Ready when: Meatballs are cooked through (center reaches 160°F/71°C), sauce is hot and fragrant

   Tip: If you're short on time, use the high setting, but low is gentler on delicate meatballs and develops deeper flavor.

5. 5

   Toast ciabatta rollsOven 450°F / 230°C

   • About 5 minutes before serving, split the ciabatta rolls if not already done.
   • Place them cut-side up on a toaster oven tray or under a broiler set to high, about 4 inches (10 cm) from the heat.
   • Toast for 2–3 minutes until the interiors are light golden and crisped slightly.

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   Ready when: Bread is warm, lightly crisped, and golden inside; edges are not burned

   Tip: Don't over-toast—you want the bread to be sturdy enough to hold the wet sauce without becoming hard or brittle.

6. 6

   Assemble sandwiches

   • Place each toasted ciabatta roll cut-side up on a plate.
   • Spoon 3 meatballs and 2–3 tablespoons (30–45 ml) of sauce into each roll.
   • Top each with a slice of provolone cheese, which will soften from the heat of the meatballs and sauce.
   • Sprinkle fresh chopped parsley over the top of each sandwich.

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   Ready when: Sandwich is fully loaded and ready to eat

   Tip: If the provolone isn't softening enough, you can slip the assembled sandwich under the broiler for 10–15 seconds just before serving, or cover it loosely with foil to trap residual heat while you assemble the others.