In large saucepan over medium heat, heat butter and curry powder. Add red pepper and onion and sauté 2 to 3 minutes; stir in walnuts, cooking 1 minute. Remove pan from heat; season with salt and pepper.
In ovenproof serving dish, place Brie. Cut thin slice from top to remove rind, if desired. Divide walnut mixture evenly and place on top of rounds.
Bake in 350° F oven 10 minutes or until cheese just starts to melt.
Servings: 2 rounds