Meatball subs with garlic rolls are the perfect Sunday dinner that can be put together in about 30 minutes!
Add the ground beef, garlic, parsley, eggs, Parmesan, and 1/4 c. of breadcrumbs to a large bowl. Using clean hands, mix everything together until it's thoroughly combined. Add the milk to soften the breadcrumbs a bit. Mix in up to 1/4 c. more breadcrumbs, until the mixture holds and doesn't stick to your hands. Roll the meat mixture into 2 Tablespoon-sized meatballs.
Heat 1/4-inch of neutral cooking oil in a large skillet over medium heat. Fry the meatballs making sure not to crowd the pan. Roll them around to ensure they get evenly cooked, about 10-15 minutes. Alternatively, you can bake them at 350* F for about 30 minutes. Test a meatball with a meat thermometer - they should reach 165* internal temperature.
Heat the broiler on the oven. To make the sandwiches, begin by combining the butter with the garlic. Split the rolls in half, and spread 1/2 Tablespoon of garlic butter on each side of the hoagie rolls.
Spoon a few tablespoons of marinara sauce on each hoagie roll. Slice 3-4 meatballs per sub, and fan them evenly over the marinara sauce. Sprinkle the mozzarella over the meatballs. Broil for 3-4 minutes, until the cheese is melted and bubbly. Garnish with basil and Parmesan. Enjoy!