Preheat the oven to 450°F and meanwhile prepare meat for cooking.
Take the meat in a mixing bowl and press it in the center using your fist.
Add to this meat well, the egg, bread crumbs, onion, garlic, red pepper flakes, Worcestershire sauce, parsley, cheese, and season with salt and pepper.
Mix the ingredients well till they combine throughout.
Make four portions of this meat mix and rolls each of these into a ball.
Place the meatballs on a baking sheet and put them in oven for 12 minutes and before removing it from the oven, check if the meat is cooked thoroughly.
Keep a saucepan on a medium flame and heat some oil. Add garlic and the herbs and pepper.
Let the flavours infuse and then add tomatoes and season with salt and pepper.
Once the sauce is boiling, reduce the flame to low and let it simmer for 10 minutes.
Place the meatballs and the sauce onto the insides of the subs and sprinkle the cheese and place the place the sub in the hot oven till the cheese melts.