Combine all of the dressing ingredients in a small blender jar. Blend until smooth and emulsified. Don't over-blend. Transfer to a mason jar and store in the fridge until ready to use.
Grill the corn and let fully cool. Slice kernels off and add to a large bowl. Add all other salad ingredients, except for feta. Toss with the dressing (to taste, you may not want it all). Taste and adjust. Serve, adding feta to individual plates.
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Notes
Note 1: Preheat your grill to medium-high, about 400°F. Remove the husks and silk from the corn. Rub each ear with olive oil and sprinkle with salt and pepper. Place the corn directly on the grill and cook for 10 to 12 minutes, turning every 3 minutes, until lightly charred all over. Let the corn cool completely before slicing the kernels off the cob.Storage: Best enjoyed the same day it’s made.