Combine wheatberries and 6 cups of water in a large saucepan.
Bring to a boil and cook until tender, 45 minutes - 1 hour. After 30 minutes, start stirring frequently until all of the liquid has been absorbed.
Meanwhile, heat 2 tablespoons of the oil in a large skillet.
Add garlic. As soon as it starts to change color, add kale and mix until kale gets coated with all of the oil.
Add 1/2 cup water and cook for 5 minutes, until all of the water has evaporated.
In a large bowl, combined wheatberries, cucumber, corn and apple. Squeeze juice from 1/2 of the lemon directly over the apple.
Add the remaining ingredients and the cooked kale. Stir to combine.
Add juice of the other 1/2 of the lemon and remaining olive oil. Stir to combine. Leave for at least 15 minutes, for flavors to combine.