We have had grass fed filet at Cali Grill and the burger (lunchtime) at the Wave used to be but haven’t been there recently. Also the Wave had free-range, hormone free chicken when we visited in July. Frontera Cocina at Disney Springs serves Creekstone Natural Black Angus beef which is grass fed, not grass finished but is of higher standards.
I’ve been searching for high quality meats (And other organic foods) at WDW for several years. It’s hard to find especially outside of the signature restaurants. Even then, it’s tricky.
Quality, organic food is a growing desire so hopefully we see WDW move forward in this area. I know cost and quantity are probably both issues for them.
Please post if you discover any hidden gems!