DON'T ADD MORE LIQUID
Start with 50ml stock. You can loosen a thick finished sauce; rescuing tomato soup is much less dignified.

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BROWNED BEEF. DEEP MUSHROOMS. PROPER SLOW-COOKED SAUCE.
A good bolognese should cling to the spaghetti, not leave it paddling. This version is built specifically for the little Crockpot: enough for two generous plates, concentrated tomato, properly browned mince and mushrooms cooked until their excess water has gone.
The mushrooms are not there to disguise the beef. They deepen the savoury flavour, add texture and make 250g of mince feel like a far more substantial sauce.
There is only 50ml of stock. That is deliberate. The onion, mushrooms and tomatoes all release moisture, and small slow cookers have very little evaporation with the lid on.
01250g lean beef mince (5% fat)
021 teaspoon olive or rapeseed oil
031 medium onion, finely diced
04150g chestnut mushrooms, sliced
052 garlic cloves, crushed
06200g canned chopped tomatoes
07150g passata
081 tablespoon tomato purée
0950ml beef stock
101 teaspoon Worcestershire sauce
111 teaspoon dried Italian herbs
12½ teaspoon smoked paprika, optional
131 bay leaf
141 teaspoon balsamic or red-wine vinegar
15½ teaspoon salt, then adjust to taste
16Plenty of black pepper
17160g dried spaghetti, to serve
1820g Parmesan, finely grated
19Fresh parsley or basil, optional
Tick what you already have. What remains is your shopping list.
Approximate values per complete serving with spaghetti and Parmesan. Ingredient brands, exact weights and cooking losses will alter the final figures.
Cost basis: Typical UK supermarket own-brand prices apportioned to the amounts used, including spaghetti and Parmesan.
Nutrition basis: Two equal complete servings using 5% beef mince, 160g dry spaghetti and 20g Parmesan. Extra cheese or garlic bread is excluded.
Heat the oil in a large frying pan over medium-high heat. Add the mince, break it into small pieces and cook for 5–6 minutes until properly browned rather than merely grey. Transfer it to the Crockpot.
Put the onion and mushrooms into the same pan. Cook for 6–8 minutes, stirring occasionally, until the onion softens and the liquid released by the mushrooms has mostly evaporated.
Add the garlic, tomato purée, Italian herbs and smoked paprika. Stir over low heat for 60 seconds until fragrant and brick-red.
Tip the pan into the Crockpot. Add the chopped tomatoes, passata, stock, Worcestershire sauce, bay leaf, salt and black pepper. Stir thoroughly.
Cover and cook for 5–6 hours on LOW or 3–3½ hours on HIGH. Keep the lid closed and begin checking toward the shorter time because small Crockpots vary.
Remove the bay leaf. Stir in the balsamic or red-wine vinegar. Taste, then adjust salt and pepper. If the sauce is loose, cook uncovered on HIGH for 20–30 minutes.
Near serving time, cook the spaghetti in well-salted boiling water until al dente. Reserve a splash of pasta water, then drain.
Toss the spaghetti with the bolognese, loosening with a little reserved pasta water only if needed. Finish with Parmesan and parsley or basil.
Use fully defrosted 5% mince. Crumble it very finely into the cold Crockpot, then add every sauce ingredient except the vinegar. Stir exceptionally well and use the same cooking times.
Check that the beef is completely cooked and the centre of the sauce reaches at least 75°C. Stir in the vinegar at the end.
This method is safe when handled correctly and pleasantly convenient, but the sauce will be softer and less deeply savoury because the beef and mushrooms have not browned.
Start with 50ml stock. You can loosen a thick finished sauce; rescuing tomato soup is much less dignified.
Cooking them before slow cooking prevents a watery, pale sauce and concentrates their flavour.
Cook spaghetti fresh. Five hours in tomato sauce would turn it into structural filler.
Rich enough for a proper evening meal, sensible enough for two and concentrated enough to stay on the spaghetti where it belongs.
PARMESAN ON. FORK READY. NO JAR REQUIRED.