To make Asian Marinade, whisk together all ingredients in medium bowl.
Cut catfish into bite-size chunks. Place in shallow dish, and add Chinese 5 Spice; toss to coat. Add ½ cup Asian Marinade, and toss to coat; let sit 10 minutes.
While fish is marinating, heat large skillet or wok over high heat for 2 minutes; add oil. Add all vegetables except bean sprouts; cook 3 minutes, stirring frequently. Remove with slotted spoon, and set aside. Add catfish to hot skillet, and stir-fry 2 minutes.
Mix in 2 teaspoons of corn starch and reserved marinade; stir until there are no lumps. Add marinade and corn starch mixture to pan. Add vegetables and bean sprouts. Cook 2 minutes or until sauce has thickened. Season with salt.
Remove from heat, and plate with your choice of rice or noodles.
Serves 4 to 6