French Dip Sandwiches

1 rump roast
1 envelopes dry onion soup mix
1  1/2 cup water
1 pkg rolls

Freezing: Place roast, water, and onion soup mix in slow cooker and cook on low for 3-6 hours. Shred meat and put meat and au jus in freezer bag. Include a bag of rolls with this meal.
To Cook: Put in crockpot 3 hours on low or until hot or on the stove until meat is hot. Serve on rolls and dip in au jus.