Sweet Potato and Apple Gratin

Everyone in the family loved this one. Perfect Thanksgiving dish. The combination of yams and apples works very well.

1 cup water
3 tbsp vegan margarine
2 lbs yams, peeled and grated
1 large granny smith apple, peeled and cored, and grated (I used 2 medium granny smith apples)
1 1/2 tbsp light brown sugar
1 tsp ground all spice (I didn't have so I used 1/2 tsp nutmeg)
1 tsp ground cinnamon\1/2 salt
1/4 tsp freshly ground pepper
2 tbsp coarsely ground pecans

Preheat oven to 375 degrees. Lightly oil a large gratin dish or 10 inch square baking pan and set aside.
In a large saucepan, bring the water to a boil over high heat. Add 2 tbsp of the margarine, stirring to melt. Add the yams, apple, sugar, allspice, cinnamon, salt and pepper. Mix thoroughly, then spoon the mixture into the gratin dish.
Dot with the remaining margarine. Bake until firm and crisp around the edges, 50 - 60 minutes. During the last 10 minutes of baking, sprinkle with pecans. Serve immediately.