30 Steps to Foolproof Low Carb Zuppa Toscana Soup

If using sausage links rather than bulk sausage, slit the casings lengthways with a small knife and squeeze the meat out into a bowl, then discard the casings. Break the sausage into rough 2 cm (¾ in) chunks so it browns evenly rather than steaming.

Stack the 115 g (4 oz) bacon rashers and cut into 1 cm (½ in) pieces. A smaller, even dice renders faster and gives you crisp, uniform bits for the topping.

Peel and dice the onion into small 5 mm pieces so it melts into the broth as it cooks. Mince the 3 garlic cloves finely and keep them separate from the onion, since garlic burns faster and goes into the pot later.

Trim the cauliflower head and break it into small, even florets around 2 cm (¾ in) across — roughly the size of a potato chunk you'd use in a classic zuppa toscana. Uniform pieces cook through in the same 20-25 minutes without turning mushy at the edges.

Strip the kale leaves from their tough centre ribs and discard the ribs. Stack several leaves at a time, roll them into a cigar shape, and slice into thin ribbons about 1 cm wide.

Set a large, heavy-bottomed pot or Dutch oven over medium-high heat and add the 15 ml (1 tbsp) olive oil. Let it shimmer for about 30 seconds — this thin coating stops the sausage from sticking during the first sear.

Add the sausage chunks to the hot pot in a single layer and leave undisturbed for 2 minutes before stirring. Cook for 6-8 minutes total, breaking it up with a wooden spoon, until deeply browned on the outside with no pink remaining inside.

Use a slotted spoon to transfer the browned sausage to a plate lined with kitchen paper, leaving as much rendered fat behind in the pot as possible. Set the sausage aside; it finishes cooking later when it returns to the broth.

Add the diced bacon to the same pot over medium heat and cook for 4-5 minutes, stirring occasionally, until the edges curl and turn deep golden brown. The fat should render out into a thin, glossy pool at the bottom of the pot.

Lift the crisp bacon out with a slotted spoon onto the plate with the sausage, leaving about 2 tablespoons of rendered fat in the pot for flavour. Set aside a small handful of bacon separately for garnishing bowls at the end.

Tip the diced onion into the fat left in the pot and cook over medium heat for 3-4 minutes, stirring often, until softened, translucent and starting to turn golden at the edges.

Stir in the minced garlic and 1/4 tsp chilli flakes and cook for 30-60 seconds, stirring constantly, just until fragrant. Pull the pot off the heat briefly if the garlic starts to brown, since scorched garlic turns bitter fast.

Pour in a splash (about 120 ml / ½ cup) of the chicken stock and scrape the bottom of the pot firmly with a wooden spoon. Lift up every browned bit stuck to the base — that fond is concentrated flavour that would otherwise be wasted.

Pour in the rest of the 1.4 litres (6 cups) chicken stock and stir to combine with the deglazed bits. The liquid should look light golden brown and slightly cloudy from the sausage fat.

Tip the browned sausage back into the pot along with any juices that collected on the plate. Stir to distribute it evenly through the broth.

Add the cauliflower florets to the pot and stir gently to submerge them in the broth. They should be mostly covered by liquid; top up with a splash of water if needed.

Increase the heat to high and bring the soup to a rolling boil, uncovered. This should take about 5 minutes depending on your pot size.

Once boiling, reduce the heat to medium-low so the soup holds a gentle simmer with small bubbles breaking the surface. Partially cover the pot with a lid and cook for 20-25 minutes.

Pierce a floret with a fork at the 20-minute mark — it should slide in easily with a little resistance, and the edges should look slightly translucent rather than opaque and chalky. If it's still firm, simmer for another 5 minutes and check again.

Once the cauliflower is tender, stir in the shredded kale in two or three batches, letting each batch wilt down for about 30 seconds before adding the next. This stops the pot from overflowing and helps the kale wilt evenly.

Continue simmering uncovered for 3-4 minutes, stirring occasionally, until the kale turns bright emerald green and loses its raw, fibrous bite.

Turn the heat down to low before adding any dairy. A hard simmer or boil at this stage can cause the cream to split into little grains of fat, so gentle heat is essential from here on.

Pour in the 240 ml (1 cup) double cream in a slow, steady stream while stirring the soup continuously with a wooden spoon. The broth should turn from clear golden to a pale, opaque ivory as the cream incorporates.

Heat gently for 2-3 minutes, stirring often, until the soup is hot all the way through and looks glossy and creamy. Do not let it boil once the cream is in, or it may curdle.

Sprinkle in the 40 g (½ cup) grated Parmesan and stir until fully melted into the broth, about 1 minute. The soup should thicken very slightly and take on a subtle nutty, savoury depth.

Taste the soup and season with fine sea salt and freshly ground black pepper as needed. Start with a small pinch of salt, stir, and taste again before adding more, since the bacon, sausage and Parmesan already carry some saltiness.

If the soup looks thicker than you like, stir in a splash of hot stock or water, 60 ml (¼ cup) at a time, until it reaches a spoonable, creamy consistency. If it's too thin, simmer uncovered for a further 3-4 minutes to reduce slightly.

Take the pot off the heat and let the soup stand for 5 minutes before serving. This short rest lets the flavours settle and thickens the broth slightly as the cauliflower releases a little starch.

Ladle the hot soup into bowls, dividing the sausage, cauliflower and kale evenly. Scatter the reserved crispy bacon and a little extra grated Parmesan over each bowl.

Serve immediately while steaming hot, with a wedge of lemon on the side if you like a little brightness cutting through the richness. Leftovers hold their texture best when cooled and refrigerated within 2 hours of cooking.