1 tbsp. butter
1 1/2 tsp. flour
1 c. evaporated milk
1 1/2 tbsp. prepared mustard
1 tbsp. diced pimiento
1 tsp. lemon juice
1/4 tsp. salt

Melt butter in saucepan over low heat. Add flour and salt, stirring to smooth. Cook 1 to 2 minutes, stirring constantly. Slowly add milk, stirring until thickens. Stir in remaining ingredients. Cook until heated.