Heat canola oil in a large heavy bottomed skillet until hot, but not smoking. Add okra and saute until starting to brown on one side, 3-5 minutes. Stir and allow to brown on the second side, another 3-5 minutes.
Mix the corn, onion, garlic, and salt into the skillet. Saute for another 5 minutes, stirring occasionally.
Remove from heat and mix in the butter and vinegar.
Whisk together the mayo, milk, hot sauce and garlic powder until smooth.
Serve the salad drizzled with the creamy sauce.
Recipe by Alison's Allspice at https://www.alisonsallspice.com/charred-okra-and-corn-salad/