Step 1

Place the green beans in a large pan of boiling water and boil them for 3 minutes (this partially cooks the green beans, whilst retaining their vibrant colour). Drain the green beans in a colander.

Step 2

Heat the oil and butter in a large frying pan (skillet) over a medium heat, until the butter starts to foam, then add the green beans, garlic, salt, and pepper.

Step 3

Cook the green beans, stirring often, for 3-4 minutes until just tender.

Step 4

Drizzle over the lemon juice and transfer to a serving plate, then sprinkle with parmesan before serving.