Meatball Sub Sandwich

Firstly, preheat your oven to a high temperature of 350 degrees F (175 degrees C). Next, combine ground beef, bread crumbs, egg, garlic, Parmesan cheese, parsley, and Italian seasoning in a large bowl. Use your hands to thoroughly mix the ingredients until they are well combined. Form the mixture into 12 meatballs and place them in a baking dish.

While your meatballs are cooking, prepare the baguette. Cut it in half lengthwise and open it like a book to create a cavity for the meatballs. Remove some of the bread from the inside and discard it, making room for your meatballs.

Before putting the baguette in the oven, brush it with olive oil and season it with garlic powder and salt. Place the baguette on a baking tray, open side facing upwards.

About 5 minutes before your meatballs are done cooking, put the baguette in the oven and cook until it's lightly toasted.

Simultaneously, warm your spaghetti sauce over medium heat in a saucepan. Remove the meatballs from the oven and use a slotted spoon to transfer them to the hot sauce. Gently mix the meatballs with the sauce.

Fill one side of the baguette with meatballs and sauce, tucking them into the well you created earlier. Top it off with slices of provolone cheese.

Return the baguette to the oven and cook until the cheese is melted, approximately 2-3 minutes.

Finally, cut your sandwiches into 4 portions and let them cool slightly before serving.