One lamb shoulder, one Sunday, one bottle from Darling

It's the last Sunday in September, the sort where you notice the light going earlier and decide the oven can stay on all afternoon. A lamb shoulder, slashed and rubbed with salt, rosemary pushed into the slits along with slivers of garlic. Into a low oven around two o'clock under foil; then genuinely left alone. Potatoes go underneath about halfway through so they cook in the fat.

By the time you pull the foil back, the meat is collapsing off the bone and the edges have gone dark and sticky. That's the moment the wine has to earn its place. Rich, fatty, herb-scented meat will flatten anything soft or jammy, so the bottle I keep reaching for on these afternoons needs two things at once: ripe fruit to match the sweetness of slow-roasted lamb, and enough lift to cut through it.

The bottle, then

It's the Old Blocks Pinotage, made by Darling Cellars on South Africa's West Coast. Darling sits close enough to the Atlantic that the ocean does most of the work: cool morning mist and fog roll in over the vineyards, a westerly sea breeze knocks the heat out of the afternoon, and the gap between warm days and cold nights lets the grapes take their time.

That slow ripening is why the wine tastes the way it does. The vineyards run across the slopes of the Darling Hills in deep, decomposed granite, planted as untrellised bush vines with no irrigation at all. The vines have to send roots down to find moisture, which keeps yields modest and the fruit concentrated.

If your experience of Pinotage is something hot and heavy that fights the food, this is the version that argues the other way. Ripe red and black fruit, real structure underneath, and a freshness that never lets it feel like hard work.

What happens in the glass next to the lamb

Pour it while you're resting the meat and the first thing you get is fruit: cherry and berry, ripe rather than cooked. Then a warmer layer behind it, a whisper of vanilla and butterscotch with coffee sitting underneath, and it lands right on the caramelised, almost burnt edges of the shoulder where the fat has rendered into the skin.

That warmth is a deliberate piece of winemaking rather than an accident. After ten days fermenting on the skins at controlled temperatures, and malolactic fermentation to soften things, the wine spends twelve months in stainless steel tanks with French and American oak staves instead of barrels. The effect is gentler: enough oak spice to echo the roast, not enough to bury the fruit.

The tannins are the other half of the story. Silky rather than grippy, so they handle the fat without drying your mouth out, and there's structure holding the whole thing together so glass three tastes as composed as glass one. There's enough in the 750ml bottle for two people to have a proper Sunday and still leave a little in the decanter.

What's left of the bottle, with cheese and chutney

Don't clear the table too quickly. The last third of the bottle is better with a wedge of mature Cheddar and a spoonful of chutney than it was with the lamb, and by then the wine has opened out and the savoury side has come forward.

This is a wine made for drinking now, and it shows best in its youth with all that fresh berry fruit up front. If you'd rather a softer, more savoury profile, the structure and those silky tannins will hold comfortably for another three to four years. But nothing is gained by waiting, and a Sunday in September is as good a reason as any.

If it isn't lamb

The same bottle covers a lot of other evenings. A charcoal-grilled rib-eye, if you're determined to squeeze the last barbecue out of the year, or sticky barbecue pork ribs eaten with your fingers and a pile of napkins.

Come November, swap the roast for a venison and red wine casserole and the wine slots straight in, the dark fruit meeting the gaminess without either one shouting. It's one of the more versatile South African reds we stock for exactly that reason.

And if you want to run a comparison across the same cellar, the Black Granite Shiraz from Darling gives you a second read on that cool Atlantic influence, from a different grape.

If that sounds like your kind of Sunday, the Old Blocks Pinotage is the bottle to have in the rack before the roasting season properly starts. It suits anyone who cooks slowly at the weekend, and anyone who has quietly written Pinotage off and might enjoy being proved wrong.