Prepare pasta al dente according to package directions. Drain, stir in 1 tablespoon of olive oil, and set aside.
While pasta is cooking, brown ground beef in a skillet over medium heat, drain and set aside.
Add peppers and onions to the skillet and heat over medium heat, cover, and cook for about 6 minutes, then remove cover, stir, and cook until onions are translucent, about 6 more minutes, stir in minced garlic and cook for 1 more minute, remove from skillet and set aside.
Prepare the sauce by adding butter to the skillet and heating over medium heat until melted, about 2 minutes.
Add cream cheese and heat while stirring into melted butter, about 3 minutes.
Whisk in heavy cream, parmesan, garlic powder, salt, and pepper.
Continue heating, stirring often, until thickened, about 2-3 minutes.
Add in the ground beef, pasta, and veggies and mix until coated.
Add 1 cup provolone cheese and mix until melted.
Top with remaining provolone cheese, allow to melt, then top with chopped parsley, and serve.