Combine the cooked vegetable, water and seasoning in blender. Blend until smooth.
In a medium sauce and heat the margarine, stir in flour and salt. Add the milk and whisk until bubbly and slightly thickened. Stir in the vegetable mixture.
Notes
Tips:Seasoning suggestions: ¼ tsp Thyme for broccoli; ½ tsp lemon peel and ⅛ tsp nutmeg for asparagus; ¾ tsp curry powder for cauliflower; ⅛ tsp thyme for mushroom; ¼ tsp dillweed for potato.