Heat 2 tablespoon of olive oil in a large skillet over medium heat. Add the garlic and sauté for 1-2 minutes, until fragrant. Then add the cubed eggplant and Italian seasoning, sautéing until the eggplant is soft, about 5-7 minutes. prep

Pour in the marinara sauce and stir to combine. Cook for an additional 3-5 minutes, allowing the sauce to heat through. Taste and adjust seasoning with salt as needed. mix

Preheat the broiler on your oven and position the oven rack in the middle. In a small bowl, combine the remaining 2 tablespoon olive oil, butter, and garlic powder. Microwave for 15-30 seconds to melt the butter, then stir to combine. prep

Place the rolls on a baking sheet, cut sides facing up. Brush the cut surfaces with the garlic butter mixture. broil

Broil the rolls for 4-5 minutes, or until just golden brown. Keep a close eye, as broiler times can vary. finish

After removing the rolls, switch the oven from broil to bake (350°F/175°C). Pile the eggplant mixture onto the toasted rolls, and top with mozzarella. Return the sandwiches to the oven and bake for 5 minutes or until the cheese is melted. finish