OVEN FRITTATA WITH HAM HOCK TOMATO & PESTO

Butter, for greasing • 1 medium courgette • 1 tbsp olive oil • 1 tbsp cornflour • 150ml milk • 6 Waitrose British Blacktail Large Free Range Eggs • 90g pack Cooks’ Ingredients Pulled Ham Hock • 250g mixed baby tomatoes, halved • 3 tbsp Sacla’ No.1 Classic Basil Pesto • 50g mature Cheddar, finely grated