In a large frying pan, heat butter over medium heat until hot.
Add ham steak, and heat for 4 to 5 minutes on the first side; flip and heat for 2 to 3 minutes on second side.
Remove ham steak from pan; put on a plate and cover with foil to keep warm.
Lower heat to low; add flour to butter and stir for 1 minute.
Add water, maple syrup, Dijon mustard and soy sauce. Stir constantly, scraping up the bits from the bottom of the pan. Stir for 2-3 minutes or until gravy is thick and smooth,
Add ham steak to gravy, and heat until desired temperature (approximately 2 to 3 minutes).
Serve with warm biscuits.