In a 2-quart saucepan, combine the freekeh, water and salt. Bring to a boil, lower to a simmer and cook for about 20 minutes, or until the grains are al dente. Drain any excess water.
Meanwhile, combine the vinegar, oil, salt, oregano, onion powder, pepper and Greek yogurt. Stir very well.
In a large bowl, combine the freekeh, dressing, sliced tomatoes and shredded kale. Toss very well to combine. Top with sliced protein of choice.