Boil or saute pierogies according to package directions. Core and thinly slice cabbage.
While pierogies cook, in a 12" skillet, heat butter on medium until golden brown and fragrant, stirring often, 3 to 4 minutes. Add onions and cook 2 minutes. Add cabbage and season with salt and pepper. Cover the skillet and cook about 7 minutes, stirring occasionally, until cabbage is tender.
While cabbage cooks, core apple and cut into thin wedges. Chop parsley. Stir apple into cabbage. Cook, uncovered, 2 minutes. Toss pierogies with cabbage and top with a dollop of sour cream. Garnish with parsley.
Source: Hannaford fresh Magazine, January February 2024