Place the round of cheese in a shallow ovenproof serving dish or pie plate. In a small bowl stir together orange marmalade and brown sugar. Spread on top of cheese. Sprinkle with toasted pecans.
Bake in a 350 degree F oven about 15 minutes for smaller round, about 20 minutes for larger round, or until cheese is slightly softened and topping is bubbly. Serve with baguette slices and/or crackers.