-
1
Warm the lard or olive oil in a heavy-based pot over a medium-low flame. Add all the sliced onion and a pinch of salt. Cook slowly, stirring occasionally, for 40–50 minutes. The onion is ready when it has collapsed entirely and turned a deep, even gold — no raw pallor, no scorched edges.
-
2
Add the sweet paprika directly to the softened onion and stir for one minute over the heat. The mixture will thicken and the fat will run red-orange; the smell is toasted, sweet, and full. Do not allow the paprika to scorch — scorched paprika is bitter and cannot be corrected.
-
3
Raise the heat to medium-high. Add the beef cubes in a single layer, turning them to coat in the paprika-onion base. Pour in the red wine and add the strip of lemon zest. Stir once to combine. This is where the dish lives or dies: the ratio of onion to meat is 1:1 by weight, and no flour is added — the onion is the sole thickener, and its full quantity must be present and correctly caramelised before the meat enters the pot.
-
4
Reduce the heat to the lowest possible setting — the target is a bare simmer at approximately 90°C, with only an occasional bubble breaking the surface. Cover the pot and braise for 2 hours 30 minutes, checking every 30 minutes. The liquid should not boil; adjust the flame accordingly. At this stage the onion will have begun to dissolve into the surrounding liquid.
-
5
Remove the lid and continue braising uncovered for a final 30 minutes. The sauce will reduce and concentrate; it should coat the back of a spoon in a uniform red-brown with no visible vegetable matter. Remove and discard the lemon zest strip.
-
6
Taste for salt. The beef is done when it yields completely to gentle pressure from a spoon but holds its cube form — it must not shred or disintegrate. The sauce must be rich, glossy, and deeply sweet with paprika warmth throughout.