Place all ingredients in a large resealable freezer bag.
Remove excess air, seal, and freeze.
Thaw in the fridge overnight.
Cook on low for 4-6 hours in a slow cooker. Add a cornstarch slurry near the end of cooking.
Or, add bag contents, plus 1 c. water or beef broth to the instant pot. Cook on meat/stew style for 18 minutes and then naturally vent for 20 minutes before doing a quick release.
Mix in a cornstarch slurry and turn instant pot to saute and heat for 15-20 more minutes.
Serve.