Step 1

Preheat the oven to 200C/180C Fan/Gas 6

Step 2

Heat a large frying pan over a medium heat. Add the oil and gently cook the onion with a pinch of salt for 4-5 minutes or until soft and translucent. Add the garlic and continue to cook for 2 minutes.

Step 3

Crumble in the sausagemeat and fry until coloured on all sides. Add the tomatoes and vegetable stock, season with a pinch of salt and pepper and turn down the heat. Gently simmer for 10 minutes while you make the white sauce.

Step 4

Melt the butter in a saucepan. Add the flour and stir to mix. Cook over a medium heat for 2-3 minutes, or until the mixture has taken on a biscuit-coloured appearance. Slowly add the milk, bit by bit, whisking as you add to prevent any lumps from forming. Season with salt and pepper and bring to a simmer. Cook for 5 minutes to thicken slightly then remove from the heat.

Step 5

Meanwhile cook the penne in a pan of salted boiling water according to the packet instructions. Once cooked, drain and pour into the pan with the sausage and tomato mixture. Mix well. Pour this into a medium-sized ovenproof baking dish. Pour over the white sauce and bake for 15-20 minutes, or until bubbling and golden.