Mix all ingredients except mushroom and gravy.
Make patties, fry on low heat till browned. Flip and repeat.
Meanwhile, slice mushrooms and fry in seperate pan about 2 mins.
When meat is browned, remove and wipe clean pan.
Add gravy mix and water to fry pan. Add mushrooms, bring just to a boil. Add patties. Simmer on low about 20 mins., flipping occasionally.
Serve with potato or noodles.