Pat meat dry with paper towels.
Combine flour, salt, and pepper in bowl.
Toss beef cubes in seasoned flour.
Heat oil in large skillet over medium-high.
Brown meat in batches, transfer to slow cooker.
In same skillet, cook onions until golden (5-7 mins).
Add garlic, cook 1 minute more.
Transfer to slow cooker.
Add broth, mushrooms, thyme.
Stir to combine.
Cover and cook on HIGH 4 hours.
Meat should be very tender.
Add noodles and parsley.
Reduce to LOW, cook 30 minutes.
Season to taste.
Let rest 5-10 minutes before serving.
