Keep vegetarians and meat-eaters happy - make two classic sauces, then assemble your lasagnes
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Melt 85g/3oz butter in a saucepan, stir in 85g/3oz plain flour, then cook for 2 mins. Slowly whisk in 750ml/1¼pt milk, then bring to the boil, stirring. Turn down heat, then cook until the sauce starts to thicken and coats the back of a wooden spoon. Sauce can now be cooled and kept in the fridge for up to 3 days or frozen for 3 months.
Homemade tomato sauce
Heat 1 tbsp olive oil in a saucepan. Add 2 onions, finely chopped, 2 garlic cloves, sliced and 1 carrot, roughly chopped. Cook for 5-7 mins over a medium heat until softened. Turn up the heat a little and stir in 2 tbsp tomato purée. Cook for 1 min, pour in 200ml white wine, then cook for 5 mins until this has reduced by two-thirds. Pour over 3 x 400g cans chopped tomatoes and add 1 handful basil leaves. Bring to the boil then simmer for 20 mins. Leave to cool, whizz in a food processor.