Philly Cheesesteak Burger

Ingredients (11)

• 1 pound beef tenderloin, (you can also use ribeye, sirloin, or Porterhouse)
• 4 hamburger buns
• 3 tablespoons unsalted butter, room temperature, divided
• 2 1/2 tablespoons olive oil, divided
• 1 yellow onion thinly sliced
• 1 green bell pepper thinly sliced
• salt and fresh ground black pepper, to taste
• 4 ounces Provolone cheese, grated or sliced
• 1/4 cup cheez Whiz warmed
• pickles, optional
• aioli sauce