Rainbow theme- 1) everything is rainbow, like rainbow cake and jelly beans, etc. or 2) each food item is a different color
Make one really cute food, like purim cookies, or a really fancy, nice thing, like baked goods or chocolates, and put a bottle of wine or something as your second food.
Buy glass/plastic vases, layer candy inside, and stick a few fake flowers in (of course, I don’t know your budget, but it sould probably work).