In a skillet, cook bacon until crisp and drain on paper towels leaving about 1 tablespoon bacon grease in the skillet.
Brown onion and beef in the bacon fat. Once browned, drain excess fat and add to a 6qt (or larger) slow cooker.
Add all remaining ingredients to the low cooker and stir to combine (it will be very full).
Cover and cook on high 3-4 hours or low 6-7 hours until rice is fully cooked.
Stir in half of cooked bacon.
Spoon into bowls, top with remaining bacon and parsley if desired.
