Mix the onion powder, garlic powder, salt, pepper, parsley, and water in a small bowl or liquid measuring cup.
2. Step
Place the potatoes in a large, gallon-sized freezer bag. Add the carrots, onion, and chuck roast.
3. Step
Pour the marinade over the contents in the bag. Seal the freezer bag and squeeze out any excess air. Gently mix the contents together so that the marinade reaches the potatoes.
4. Step
Freeze for up to 3 months.
5. Step
When ready to enjoy, thaw completely and pour the contents into slow cooker.
6. Step
Cook on low for 8 hours, or high for 4 hours, or until the roast is cooked through and tender.
