CARBONARA WITH BACON BEANS AND COURGETTE

180g spaghetti • 100g baby broad beans or peas • 1 tbsp olive oil • 1 courgette, halved lengthways and sliced into half moons • 2 garlic cloves, halved • 5 rashers Waitrose 1 Free Range Unsmoked Streaky Bacon, chopped • 1 British Blacktail Free Range Medium Egg yolk • 20g finely grated parmigiano reggiano • 3 tbsp single cream • ½ lemon, juice