Recipe from my grandmother:
1 lb zucchini sliced (4 cups)
1/2 c water
1/2 tsp salt
1/2 tsp sugar
2 Tbsp chopped onion
2 Tbsp butter
2 Tbsp flour
1/2 tsp salt
dash pepper
2 c milk
Peel, cut out seeds and slice zucchini. Combine w/water, 1/2 tsp salt and sugar. Bring to boil, cover and simmer 15 minutes or until tender. Puree in blender. Cook onion in butter til tender. Blend in flour, salt and pepper. Add milk and pureed zucchini. Cook and stir until thickened and boils.
Enjoy!