• You will also need: sheet pan, large non-stick skillet with a lid

Cook the Italian Sausage

• Heat the oil in a large, non-stick skillet over medium heat. When the oil is hot, add the sausage. Cook the sausage for 4-6 minutes, turning them occasionally to brown on all sides.
• Carefully add the water to the skillet and cover.
• Cook the sausages for 15-20 minutes until most of the liquid has cooked out and the internal temperature reaches at least 165°F.
• Take the skillet off the heat and remove the sausages, place on a pan or plate and loosely cover with foil to keep warm.

Cook the Onions

• If there is any liquid left in the skillet drain it off, but do not wash. There should be a layer of oil, if there’s not, add one teaspoon.
• Heat the skillet on medium. When the skillet is hot, add the onions. Cook them gently for 5-7 minutes until golden, stirring frequently. Remove the skillet from the heat.

Preheat the oven

• While the onions cook, move the oven rack to the bottom third of the oven and set it to the low broil setting.

Build the Sandwiches

• Cut each sub/hoagie roll to roughly the size of the cooked sausage. Then cut the bread in half lengthwise, but don’t go all the way through.
• Add two tablespoons of the marinara sauce to the bottom piece of the roll and sprinkle with about 2 tablespoons of mozzarella cheese.
• Add one sausage to each roll and top each with two tablespoons of marinara sauce, cooked onions and 2 tablespoons of shredded mozzarella cheese.
• Arrange the Italian sausage sandwiches on a baking sheet. Place the baking sheet in the preheated oven.
• Broil the sandwiches for 4-5 minutes or until the bread is lightly toasted and the cheese is melted. Do not step away from the oven; keep an eye on the sandwiches so they don’t burn.
• Garnish with chopped parsley if desired.