Mini Meatball Subs

Mini meatball subs are small, open-faced sandwiches topped with warm meatballs, marinara sauce, and melted cheese. The key is toasting the bread first so it stays firm under the hot filling instead of turning into mush.

Ingredients for Mini Meatball Subs

Ground beef forms the base of tender meatballs. Panko breadcrumbs and milk keep them moist and light. Parmesan cheese adds savory depth, while garlic and Italian seasoning season the meat. Salt and black pepper round out the flavor. Marinara sauce coats the meatballs with tangy tomato flavor. Mozzarella cheese melts into creamy strings on top. Sub rolls provide the structure, toasted until crisp so they hold up to the hot, saucy filling.

Why This Mini Meatball Subs Works

The meatballs are baked instead of fried, which means less mess and more even cooking. Mixing milk into the breadcrumbs before adding it to the meat keeps the meatballs from becoming dense or tough. They stay tender and juicy even as they bake.

Toasting the rolls before assembly is what stops them from getting soggy. The heat dries out the cut surface just enough so the bread soaks up sauce without falling apart. The mozzarella goes on after toasting and melts under the broiler, binding everything together.

Assembling the subs just before serving means the sauce is still hot and the cheese still bubbling. If you build them too early, the bread starts to absorb liquid and soften.

Mistakes To Avoid

Overmixing the meatball mixture makes them dense and rubbery. Mix only until the ingredients just come together, then stop. Overworked meatballs feel hard and squeaky when you bite into them.

Skipping the toast step means the bread absorbs sauce and falls apart in your hands. The toasted surface acts as a barrier that lets the bread soak up flavor without losing its structure.

Assembling the subs too far in advance causes the bread to get soggy and the cheese to cool and harden. Build them right before serving so the meatballs, sauce, and cheese are all still hot.

Using cold mozzarella straight from the fridge means it will not melt evenly under the broiler. Let it sit at room temperature for 10 minutes so it melts smoothly and covers the meatballs in a creamy layer.

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Ingredients

• 1 pound ground beef
• 1/3 cup panko breadcrumbs
• 1/4 cup whole milk
• 1/4 cup grated Parmesan cheese
• 2 cloves garlic, minced
• 1 teaspoon Italian seasoning
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper
• 1 1/2 cups marinara sauce
• 4 mini sub rolls, halved lengthwise
• 1 1/2 cups shredded mozzarella cheese

Step-by-step Instructions

1. Heat the oven to 400°F (200°C). Line a baking sheet with foil or parchment.
2. In a small bowl, stir the panko and milk together and let sit for 1 minute until the breadcrumbs are soft.
3. In a large bowl, combine the ground beef, soaked breadcrumbs, Parmesan, garlic, Italian seasoning, salt, and pepper. Mix gently with your hands until just combined, about 10 to 15 seconds.
4. Roll the mixture into 16 meatballs, each about the size of a walnut, and place them on the prepared baking sheet.
5. Bake at 400°F (200°C) for 12 to 15 minutes until the meatballs are cooked through and reach 160°F (71°C) on an instant-read thermometer.
6. While the meatballs bake, warm the marinara sauce in a small pot over medium heat for 3 to 4 minutes, stirring occasionally, until steaming.
7. Place the sub roll halves cut-side up on a broiler-safe baking sheet. Broil 4 to 6 inches from the heat for 1 to 2 minutes until the cut sides are golden and dry to the touch.
8. Remove the toasted rolls from the broiler. Divide the meatballs among the roll halves, placing 2 meatballs per piece.
9. Spoon the warm marinara sauce over the meatballs, then top each with 1 to 2 tablespoons of mozzarella cheese.
10. Return the subs to the broiler 4 to 6 inches from the heat for 1 to 2 minutes until the cheese is melted and bubbling. Serve immediately.