Steamed Salsify, Parsnips, and Potatoes with Curry Sauce

1 cup salsify, sliced
1 cup parsnips, sliced
1 cup potatoes, sliced
3 Tbsp lemon juice
2 Tbsp all-purpose flour
1 Tbsp butter
2 Tbsp green onion, minced
½ cup milk, fat free
1 tsp curry powder
¼ tsp salt
¼ tsp black pepper

Instructions:
Trim and peel salsify; slice thinly into a bowl of water with lemon or lime juice added. This prevents discoloration of salsify. Drain; place slices of salsify, parsnips, and potatoes in saucepan with water to cover. Bring to boiling; reduce heat and simmer 8 to 10 minutes or till tender. Drain; transfer to serving platter. In same pan, melt butter and sauté onion for 1 minute. Stir in flour; add milk all at once. Cook until thickened and bubbly. Stir in curry, salt and pepper; cook 2 minutes more. Spoon sauce over salsify, parsnips, and potatoes; serve.