Preheat oven to 350F. Lightly oil a shallow casserole dish. Arrange sweet potato slices on overlapping rows in the dish.

In a small bowl, combine the maple syrup, oil, orange juice, cinnamon and salt. Pour this evenly over the potatoes. Sprinkle the top with tarragon.

Cover & bake until easily pierced with a fork, but the potatoes ought to be still firm. This should take about 30 minutes. Uncover & bake until glazed and golden around the edges, about another 25 minutes.