1 1/2 tbsp. flour
1 c. water
1 tsp. instant chicken bouillon
1/2 to 1 tbsp. horseradish (to taste)
1/2 tsp. ground mustard
2 tsp. prepared mustard
1 tbsp. butter

Mix flour with 1/4 cup water in a saucepan, stir until smooth. Slowly add rest of water, stirring constantly to keep mixture smooth. Add rest of ingredients and mix well. Heat oven at low flame, stirring constantly as mixture thickens. Serve with salmon dish.