Heat the olive oil in a large skillet over medium heat. Add the finely chopped onion and sauté for approximately 3-4 minutes until it becomes translucent and fragrant.
Add the minced garlic and the ground beef to the skillet. Cook this mixture for about 6-8 minutes, stirring frequently and breaking up the beef with a spatula until it's browned and fully cooked.
Season the beef with smoked paprika, dried oregano, and salt and pepper to taste. Stir thoroughly to well combine the spices with the beef.
Lower the heat and incorporate the drained diced tomatoes into the beef mixture. Gently fold until everything is evenly blended.
Remove the skillet from the heat and add half of the shredded cheddar and mozzarella cheese to the beef mixture. Stir until the cheeses are melted and create a creamy filling.
Preheat your oven to 375°F (190°C) to prepare for baking.
Carefully slice the hoagie rolls lengthwise, taking care not to cut all the way through. This will create a pocket for your delicious filling.
Generously fill each hoagie roll with the cheesy ground beef mixture, ensuring an ample amount cascades into each roll.
Sprinkle the remaining cheddar and mozzarella cheese over the top of the filled hoagies, allowing it to melt beautifully during baking.
Arrange the stuffed hoagie rolls on a baking sheet and place them in the preheated oven. Bake for 10-12 minutes, or until the cheese is bubbling and golden brown, inviting and delicious.
If you’d like to add some heat, sprinkle the pickled jalapeños on top of the hoagies about five minutes before they finish baking.
Once baked to perfection, take the hoagies out of the oven and allow them to cool slightly. Finish with a garnish of chopped fresh parsley for a pop of color and freshness before serving.
Notes
Serve the gooey melts on a rustic wooden cutting board. Drizzle any extra melted cheese over the top for added indulgence. Garnish with a sprinkle of fresh parsley and offer a side of pickled jalapeños to give those who love spice an extra zing!