As a kid I refused to eat Rosenkohl (rose cabbage, brussel sprouts) before X-mas. The first frosts made the Brussel sprouts sweet. If you don't harvest the sprouts and the plant survives ít will have nice blossoms the next year. We used the resulting seeds for new plants.
If the Brussel sprouts are sweet my grandma mixed raisins, walnuts, apples, sweet potato wedges, sweet cream and the sprouts for the sweet note in a pan and then garlic, onions and European barberries for the contrast. Are barberries commonly used for anything else than Brussel Sprouts? We have some bushes of them. My main use is for fruit wine, marinating and roasting them with sugar for caramel effect and used in salades.
It was funny I opened the German site for Berberitze , clicked on English for translation and it named it barberry. And the english site had this picture: Brussel Sprouts with barberries ...