Onion and Black Vinegar Mixed Lamb Liver

This is a refreshing, no-cook (or minimal-cook) cold appetizer popular in northern and home-style Chinese cooking, especially as a drinking snack .

It features tender pre-cooked lamb liver thinly sliced and tossed with crisp raw onion, a tangy black vinegar dressing, garlic, chili, and herbs for a bold, savory-sour-spicy flavor. 

The black vinegar cuts through the rich liver taste, while onion adds crunch and sweetness.

Note: Lamb liver must be pre-cooked (usually boiled) to ensure safety and tenderness. Raw liver is not used here.Ingredients (serves 3–4 as appetizer)Main ingredients:

• Pre-cooked lamb liver ( boiled lamb liver) — 300–400 g (buy pre-boiled from butcher or cook yourself — see prep note below)
• Red onion (or white/yellow onion) — 1 large (about 200–250 g)
• Cilantro — 1 small bunch (about 20–30 g), roughly chopped
• Green onion / scallion — 2–3 stalks, cut into 1–2 inch segments
• Fresh red chili or green chili — 1–2 (deseeded if less spicy), thinly sliced
• Garlic — 3–4 cloves, minced or finely chopped

Dressing:

• Chinese black vinegar (Zhenjiang black vinegar preferred) — 3–4 tbsp (adjust for tanginess)
• Light soy sauce — 1–1½ tbsp
• Salt — ½–¾ tsp (to taste)
• Sugar — ½–1 tsp (to balance acidity)
• Sesame oil — 1–2 tsp
• Optional: a pinch of MSG or chicken powder for extra umami
• Optional heat: a few drops of chili oil or ground Sichuan peppercorn powder

Preparation Note for Lamb Liver (if not pre-cooked)

• Rinse fresh lamb liver, remove any tough membranes/sinew.
• Boil in water with 2–3 slices ginger, 1 tbsp Shaoxing wine, and a pinch of salt for 15–20 minutes until just cooked through (internal temp ~160°F/71°C; do not overcook or it turns tough).
• Cool completely, then refrigerate until ready to use.

Step-by-Step Instructions

1. Prepare the lamb liver
   • Once fully cooled, slice the liver thinly (about 2–3 mm thick) against the grain.
   • Then cut the slices into thin strips (matchstick size, about as thick as chopsticks). This creates more surface area for the dressing to coat. Set aside.
2. Prep the vegetables
   • Peel and thinly slice the onion (julienne or half-moon slices for crunch). Soak in ice water for 5–10 minutes if you want to mellow the raw sharpness (optional but recommended for milder flavor). Drain well and pat dry.
   • Cut green onion into 1–2 inch segments.
   • Deseed and thinly slice chili.
   • Roughly chop cilantro.
   • Mince garlic finely.
3. Make the dressing
   • In a small bowl, mix: black vinegar, light soy sauce, salt, sugar, minced garlic, and sesame oil.
   • Stir until sugar dissolves. Taste and adjust — it should be tangy, savory, slightly sweet, with a strong vinegar kick. Add chili oil or Sichuan pepper if desired for heat.
4. Assemble the dish
   • In a large mixing bowl, combine: sliced lamb liver, drained onion, green onion segments, chili slices, and cilantro.
   • Pour the dressing over everything.
   • Toss gently but thoroughly with chopsticks or clean hands (wear gloves if sensitive to vinegar) until evenly coated. Let marinate 5–10 minutes for flavors to meld (do not marinate too long or onion softens).
5. Serve
   • Transfer to a serving plate or small bowls.
   • Garnish with extra cilantro or a sprinkle of toasted sesame seeds if desired.
   • Serve chilled or at room temperature as a cold appetizer, with beer, baijiu, or rice porridge. It's best eaten fresh the same day.

Quick Tips for Best Result

• Texture is key → Slice liver very thin and uniform; raw onion must be crisp. Over-boiled liver becomes rubbery — aim for tender but firm.
• Black vinegar choice → Zhenjiang is ideal for its smoky, malty depth. If unavailable, use a good-quality Chinese black vinegar.
• Spice level → Adjust chili to taste; this dish is often mildly spicy.
• Variations → Some add shredded carrot or cucumber for extra crunch, or a dash of aged soy sauce for color.
• Storage → Best fresh. Refrigerate leftovers up to 1 day; flavors intensify but onion may wilt.
• Health note → Lamb liver is nutrient-dense (rich in iron, vitamin A, B vitamins) but high in cholesterol — enjoy in moderation.

This dish is simple yet addictive — the sour black vinegar + sweet onion + rich liver creates perfect balance. Enjoy your homemade