01 -
Heat oil in a large skillet over medium-high heat. Brown the beef stewing meat on all sides until well-seared. Drain any excess grease.
02 -
Transfer browned beef to slow cooker. Add beef broth, tomatoes, and puttanesca sauce. Cook on low for 6-8 hours until beef is tender and falling apart. Add pasta during the last 30 minutes of cooking.
03 -
Use sauté function to brown beef in oil. Add broth, tomatoes, and sauce, scraping bottom to deglaze. Cook on high pressure for 60 minutes with natural release. After release, add pasta and let cook in hot soup for 20 minutes.
04 -
Taste and adjust flavor with sugar if needed to balance acidity. Serve hot in bowls, topped with grated parmesan if desired.