Mix both onion packets and warm water in your slow cooker.
Stir until soup mix has dissolved
Add pastrami (Separate the slices so they cook evenly)
Cook on low for 4-6 hours or on high for 1-2 hours
Layer meat onto your hoagie roll and top with provalone cheese.
Leave sandwich open faced on a baking sheet and place under hot broiler until bread and cheese are toasted. (Keep a close eye on your broiler!)
Video
Notes
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As with any of our recipes, carb counts, calorie counts and nutritional information varies greatly. As a result, your nutritional content depends on which products you choose to use when cooking this dish. The auto-calculation is just an automated estimate and should NOT be used for specific dietary needs.
All slow cookers cook differently, so cooking times are always a basic guideline. Recipes should always be tested first in your own slow cooker and time adjusted as needed.