Preheat the oven to 450 degrees.
Wash and dry your rutabagas and trim any roots. Cut into fries, about 1/4-1/2 inch thick.
Toss the fries in a bowl with fat and salt to taste. Arrange on baking sheets, no more than 1/2 inch apart. Bake for 20-25 minutes (depending on how crispy you like them), flipping halfway through.