Dry catfish well. Combine remaining ingredients except cheese. Brush catfish inside & out with sauce. Place in greased 13x9x2-inch baking dish. Brush with rmaining sauce; sprinkle with cheese. let stand for 30 minutes. Bake in 350-degree oven for 25 to 35 minutes or until fish flakes easily. Remove from oven. Place about 3-inches from heat source in broiler. Broil for 1 to 2-minutes or until crisp and lightly browned.
Garnish with watercress and lemon slices. Yield 6 servings.