1️⃣ In a medium mixing bowl, add mayonnaise, garlic, lemon juice, and salt. Stir and set aside. 🥄

2️⃣ In a large bowl, add steak, brown sugar, balsamic vinegar, vegetable oil, salt, and pepper. Toss well to coat. 🥩

3️⃣ In a cast-iron skillet on medium heat, add butter and onions. Cook, stirring often, for 10-12 minutes until they’ve caramelized. 🧅

4️⃣ Remove onions from the skillet and set aside. 🌬️

5️⃣ Raise the heat to high and add steak to the skillet, letting the marinade drip off before adding to the pan. Sear each side for 3-4 minutes. 🔥

6️⃣ Let the steak rest for 5 minutes, then slice thinly against the grain. 🔪

7️⃣ Brush hoagie rolls with melted butter and place buttered side down onto a griddle or pan to brown for 2-3 minutes. 🥖

8️⃣ Spread garlic aioli on the hoagie rolls, add Provolone cheese, arugula, steak slices, and caramelized onions. 🧀🌿🥩🧅

Enjoy your delicious steak sandwich! 😋