Arrange salmon steaks on roasting rack with thickest portions toward outside of rack.
Cover with wax paper.
Microwave at 70% (Medium High) for 7 to 10 minutes, or until fish flakes easily with fork, rotating rack once or twice.
Let stand, covered, while preparing sauce.
In 1-cup measure, combine all caper sauce ingredients.
Microwave at High for 30 seconds to 1 minute, or until warm.
Serve sauce over salmon.