Calf's liver with sweet onions, slow-cooked Venetian-style until silky. This high protein mediterranean dish is rich in iron and B vitamins, making it a nutrient-dense family dinner.
Slice the sweet onions thinly and soak them in cold water for 10 minutes to mellow their sharpness.
Heat olive oil in a large skillet over medium-low, then add onions and cook slowly for 15 minutes, stirring occasionally to prevent browning.
Increase heat to medium, push onions to the side, and add unsalted butter. Lay the calf's liver slices in the pan; cook for 2–3 minutes per side to keep the liver tender.
Sprinkle salt and black pepper over the liver, then deglaze the pan with white wine vinegar. Stir gently so the cooked onions coat the liver.
Garnish with fresh parsley and serve hot, ensuring the liver stays pink in the center for a silky texture.