Add ingredients from stew meat to beef broth into a 6-quart crock pot then cover and cook on low for 6-8 hours, or until meat is fall-apart tender.
Add flour to a bowl then add a ladleful of cooking liquid and whisk until smooth. Pour back into crock pot then stir well to combine and cook on high for 30-45 more minutes, or until broth has thickened (Note: broth will continue to thicken as it cools). Stir in peas then let sit until heated through, 5 minutes, before serving.
Notes
Leftovers, when cold, will be thick. Heat it up and if it's still too thick feel free to splash in beef broth to your desired level.