Candied yams

Candied yams 3 large sweet potatoes 1/2 cup sugar 1/4 cup brown sugar 1 teaspoon good vanilla extract 1/4 teaspoon salt 1/2 teaspoon nutmeg 3/4 stick real butter 1 lemon slice Peel and cut sweet potatoes then add them to a heavy saucepan. Add sugars, butter, salt, nutmeg and lemon . Cover and cook on med low heat for about 20 minutes. Add vanilla and let simmer another 10 minutes or so until potatoes are tender and the sugar and butter have thickened to a glaze.