5 issues of BBC Good Food for £5
Boil the corn for 10 mins in salted water, rinse in cold water, then cut the kernels off. Tip the beans into a bowl with the cooked corn, avocado, tomatoes and spring onions.
Mix the dressing ingredients with some seasoning, then pour over the salad. Toss together well, scatter the feta over the top and serve with lime wedges, if using.