In a large skillet, pour in the olive oil and set the heat to medium. Allow the oil to warm up for about 1 minute.
Add the sliced onion, green bell pepper, and red bell pepper to the skillet. Sauté the mixture for 5-7 minutes, stirring occasionally, until the vegetables are softened and starting to caramelize.
Incorporate the minced garlic into the skillet and continue sautéing for an additional minute, stirring constantly until fragrant.
Push the sautéed vegetables to the sides of the skillet, creating a space in the center. Add the ground beef to the skillet and use a spatula to break it apart. Cook for about 5-7 minutes, or until the beef is browned and no longer pink, stirring occasionally to combine with the veggies.
Once the beef is cooked, stir in the Worcestershire sauce. Season with salt and freshly ground black pepper to taste. Cook for an additional 2-3 minutes, allowing the flavors to meld together.
Preheat your oven's broiler on high. While it heats up, carefully split the hoagie rolls open and arrange them cut-side up on a baking sheet.
Evenly distribute the beef and vegetable mixture into each hoagie roll, ensuring each one is generously filled.
Place two slices of provolone cheese on top of each filled hoagie. Slide the baking sheet under the broiler for 2-3 minutes, keeping a close eye on them until the cheese is melted, bubbly, and slightly golden.
Remove the cheesesteaks from the oven. Garnish each sandwich with a sprinkle of finely chopped fresh parsley for a pop of color and freshness. Serve immediately while hot and gooey.
Notes
Serve on a wooden platter with extra chopped parsley and pair with crispy potato fries or a light salad.