Place cooked wheat berries in a mixing bowl.
Whisk olive oil, lemon juice, garlic together and season with salt and pepper.
Pour dressing over wheat berries and toss well.
Lightly chop parsley, celery leaves, and mint (large pieces)
Add chopped herbs, scallion, jalapeño, cucumber, and tomatoes to wheat berries and toss to combine ingredients and coat with dressing.
Adjust seasoning with additional salt and pepper.
Refrigerate for 15 minutes or so to let flavors blend.