Boil salted water and cook penne pasta for 8 minutes until firm, then drain and set aside.
Heat olive oil in a skillet on high and cook sliced ribeye for 3 minutes until brown.
Season the beef with salt and pepper, take it out, and put it aside for later.
Add butter to the skillet and cook the bell peppers and onions for 5 minutes until soft.
Mix in minced garlic and cook for 30 seconds, then turn the heat to medium.
Add cream cheese to veggies and stir, then pour in beef broth and heavy cream.
Let the sauce bubble for 2 minutes, then add the pasta, beef, and provolone cheese back in.
Pour everything into the baking dish, add more provolone and mozzarella on top, and cover with foil.
Bake covered at 375°F for 20 minutes, take off foil, and bake 8 more minutes.
Let the casserole sit for 5 minutes so the sauce can thicken up before you serve.