Lemon, ricotta and cherry tomato pasta bake

Method

1. Preheat the oven to 180°C/fan160°C/gas 4. Cook the pasta shells in boiling salted water for 8-9 minutes until just al dente, drain and run under cold water, then set aside.
2. Meanwhile, put the spinach in a colander in the sink and pour over boiling water to wilt. Leave to cool. Pour the tinned tomatoes with a squeeze of lemon juice into a pan and bubble over a medium heat for 6-7 minutes until reduced and thickened. Season with salt, pepper and a pinch of sugar, then toss through the pasta shells.
3. Squeeze any excess water out of the spinach, then, in a bowl, mix it with the ricotta and lemon zest. Season. Put the tomatoey pasta in an ovenproof dish and stuff as many shells as you can with the lemony ricotta. Scatter over the fresh cherry tomatoes, sprinkle over the gruyère, then transfer to the oven and cook for 15-20 minutes until browned and cooked through.