Score the skin of the duck breast with a sharp knife and season with salt, rub into the skin, leave to rest for a few minutes.
Place the breast skin side down in a cold non-stick frying pan over a medium heat.
As the fat is released, tilt the pan towards you and use a spoon to remove the liquid.
Cook the breast for approximately 6 minutes, then turn it over and continue to cook for a further 4 minutes.
Using tongs, turn the breast on its side to evenly sear the meat on all surfaces then remove the breast from the pan.
Allow the breast to stand for 5 - 10 minutes before serving.
Tip: to test doneness of the duck breast, press it with your finger - it should be firm but still springy to the touch.
Remove all but 2 tbsp of the rendered fat, and butter and turn on the heat to medium high.
Add onion and garlic and saute until onions become translucent.
Add the tomatoes, beans, balsamic and herbs and toss with onions until the tomatoes have softened and the beans are warmed.
Remove from the heat and plate ready for the duck. top with the crumbled cheese.
Add all the sauce ingredients to the pan and bring to a rolling simmer over a high heat. Lower the heat and add the cornflour and combine. Lower the heat and simmer for 3 minutes.
Slice the duck into 4-5 pieces and lay on top of the warm salad. Top with 2-3 tbsp of the sauce and serve.