Step 1
Put everything but the flour and tomato paste in a slow cooker, stir to combine
Step 2
Cove and cook on the low setter for 8 to 9 hours or on high for 4 to 5 hours, until the beef is teder and the potatoes are tender.
Step 3
Stir the stew once or twice as it cooks, if possible. About 30 min before serving, transfer a ladelful of the broth to a small mixing bowl.
Step 4
Add the flour and tomato paste and whisk until smooth. Stir the mixture into the stew and cook the remaining half hour.