Ham and Mushrooms (using leftover ham)
rec.food.cooking/nipo mo (2000)

1 lb. fully cooked diced ham
1 tbsp. margarine
1 cup sliced fresh mushrooms
1/4 cup finely chopped onion
3 tbsp. flour
1 1/2 cup milk
2 tsp. prepared mustard
1 tsp. horseradish sauce
1/2 tsp. salt

Melt butter. Add mushroms and onion. Blend in flour. Stir in milk, mustard, horseradish, and salt. Cook, stirring constantly, until sauce thickens. Fold in ham and lemon juice; heat.

Serve over toast, or noodles, or potatoes.