Peel and thinly slice the shallots (or onions). Add about a tablespoon of olive oil to a hot pan, add shallots and cook for about 5 minutes over low heat.
Add cooked string beans to the pan and cook over low heat for about 5 minutes.
Toast seeds and Serve
Toast sesame seeds in a hot pan (no need for oil). You can use a mixture of black and white sesame seeds to add some contrast. Add toasted sesame seeds to your string beans and shallots. Stir to combine, add lemon zest, season to taste with salt and pepper and serve. Optionally add shredded parmesan cheese or tofu or serve this salad with fish. Serve cold or warm. Enjoy.