01 - Warm olive oil in a large sauté pan or skillet over medium heat until shimmering.
02 - Add sliced onions to the pan. Cook for 3–4 minutes, stirring occasionally, until softened and translucent.
03 - Stir in minced garlic and cook for 30 seconds until fragrant, being careful not to burn.
04 - Add sliced mushrooms to the pan. Cook, stirring frequently, for 5–6 minutes until they release their moisture and begin to brown.
05 - Stir in sliced cabbage and thyme. Toss well to combine. Sauté for 8–10 minutes, stirring frequently, until cabbage is tender-crisp.
06 - Season generously with salt and pepper. Add lemon juice or vinegar if desired for brightness. Remove from heat.
07 - Transfer to a serving dish and sprinkle with chopped fresh parsley before serving.