Pork tenderloin, approximately 1 lb.
1/4 c. water
3 tbsp. Dijon style mustard
2 tbsp. cooking oil
1 tbsp. soy sauce

Mix marinade ingredients. Brush over pork. Let set at least 1 hour, refrigerate if longer. Cook in microwave 25 minutes at medium low (cover with plastic wrap). Reserve marinade. Cook on grill until browned, basting with marinade.