To steam the corn, bring a large pot of water to a boil. Once boiling, you can either add the ear of corn straight into the water or place it in a steamer basket. Cover with a lid and let steam for 5 minutes.
While the corn steams, chop up all other ingredients! This includes the strawberries, cherry tomatoes, cucumber, and avocado. Crumble the feta, chop the fresh basil, and set aside.
Once the corn is done, remove from water and allow to cool for a few minutes (until it's comfortable to touch). Using a large knife, place the corn upright and slice the kernels off into a bowl.
In a large salad bowl, add the kernels of corn, sliced strawberries, cherry tomatoes, cucumber, and avocado chunks. Sprinkle with crumbled feta, chopped basil, olive oil, freshly-squeezed lemon juice, salt, and pepper. Toss everything to combine.
You can enjoy this salad immediately, or place it in the fridge for 30 mins to allow it to cool!