Start by preparing your vegetables and beef. Thinly slice the beef sirloin, onion, and bell peppers. Place them into your crock pot.
Add the beef broth, ensuring all ingredients are immersed. Season with salt and pepper, then place the lid on your crock pot. Cook on low for 6 hours or high for 3 hours.
After the cooking time, add heavy cream and cream cheese, stirring until the cream cheese melts, creating a creamy sauce.
Stir in the tortellini and shredded cheese, cooking on low for an additional 30 minutes, until the tortellini is cooked.
Taste and adjust seasoning as necessary. Serve hot.
Notes
Store leftovers in an airtight container in the refrigerator for up to 3 days. Reheat on the stovetop or in the microwave, stirring occasionally.