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Lay the steak down on a clean, flat surface. Rub both side of the steak with half the olive oil. Then rub the salt, pepper, and garlic powder into both sides of the steak.
Heat the other half of the olive oil in a skillet not much larger than the steak on a high heat. Place the steak down in the skillet. Cook it on high heat for 1-2 minutes. Then, reduce the heat to a medium low. Cook the steak 4-5 minutes per side or to your preferred doneness. For this recipe, a medium to medium well steak is best.
Once the steak has completed cooking, remove it from the heat and set it aside to rest. Meanwhile, chop the lettuce, cucumber, and carrot, and arrange the ingredients on a serving plate.
Once the steak has rested for at least 5 minutes, slice it into strips and place it on your salad.
For the buttermilk dressing, whisk together all the ingredients except for the mayonnaise. Whisk the mayonnaise into the dressing about 1 TB at a time until it reaches your preferred thickness. You may not need to use all the mayo, or you may want to add more.
Serve your salad with the dressing on the side. Pour the dressing over your salad at your leisure and enjoy!