Grandmother'S Potatoes And Squash
["2 large onions, peeled and sliced thinly", "6 to 8 medium potatoes, peeled and sliced thinly", "2 to 3 medium zucchini (about 1/8-inch thick), scrubbed and sliced", "2 Tbsp. vegetable oil", "fresh tomatoes (optional)"]
["Saute onions until golden in large frypan. Add potatoes and squash (tomatoes, if desired).", "Season with salt and pepper to taste.", "Occasionally turn vegetables carefully with spatula. Ready to serve with potatoes are soft."]
["onions", "potatoes", "zucchini", "vegetable oil", "tomatoes"]