Courgette & goat's cheese tart

Name: Courgette & goat's cheese tart
Prep time: 30 min
Cook time: 1 h 10 min
Total time: 1 h 40 min
Cuisine: French
Ingredients: plain flour for dusting; 500g pack shortcrust pastry; 1 fat pinch saffron threads; 500g courgettes all but one coarsely grated; knob of butter; 4 eggs; 284ml pot whipping cream; 140g soft goat's cheese; 2 handfuls rocket leaves, to serve