Begin by slicing the flank steak into thin strips. Next, slice the onion and the green bell pepper, and mince the garlic cloves.
Add the sliced flank steak, onion, bell pepper, and minced garlic into the crock pot. Pour 2 cups of beef broth over the ingredients. Season with salt and pepper to taste.
Set your crock pot to low and let it cook for 6 hours.
After the 6-hour mark, add cream cheese, mozzarella, and provolone to the mix. Stir everything to ensure the cheeses melt thoroughly.
Finally, add the cheese tortellini into the crock pot and stir until the pasta is well submerged in the cheesy sauce. Cook for an additional 30 minutes on high.
Notes
Store in an airtight container and refrigerate for up to 3 days. Reheat thoroughly before serving.