200g/7oz cherry tomatoes
1 courgette, trimmed and cut into roughly 2cm chunks
½ small lemon, finely grated zest and juice
1 yellow pepper, deseeded and cut into roughly 2cm chunks
2 large handfuls young spinach leaves (around 75g/2½oz)
2 spring onions, trimmed and sliced
150g/5oz whole wheat pasta, such as spaghetti
¼ tsp dried chilli flakes
sea salt and freshly ground black pepper
2 tbsp extra virgin olive oil
grated Parmesan (or alternative vegetarian hard cheese), to serve (optional)