The yellow you,ve chosen sounds lovely,a happy cheerful colour. Slice peeled sweet potatoes into rounds. Place in a saucepan with a little boiling water to just cover. Simmer until tender about 30 minutes. Remove and drain.
Place slices in an ovenproof dish.
Add bits of butter, sugar, grated orange peel and juice. Sprinkle with nutmeg and add cinnamon sticks.