Preheat your oven to 200 degrees.
Meanwhile, scatter your green beans onto a baking tray and drizzle with olive oil.
Toss the beans around to give them a good coating and place in the oven.
Once they're beginning to colour and bubble (around 10 mins depending on your oven), give them another toss around to flip them over and scatter your slices of garlic over, too.
Place back in the oven for another 5 minutes or so before removing from the heat to cool.
Divide your tomatoes and onion between two bowls and crumble the cheese over the top.
Now divide the green beans and garlic slices between the two bowls.
Gently mix the green bean salad ingredients.
Scatter broken walnut pieces over the top of your white cheese and green bean salad.