In glass or ceramic bowl, place wheat berries. Cover with 2 inches (5 cm) water and let sit overnight in refrigerator to soften. In morning, drain water.
Place berries in small saucepan, add salt and 3 cups (750 mL) water. Bring to a boil and then reduce heat and simmer for about 45-55 minutes or until tender. Drain any excess water and place berries in large mixing bowl.
Add celery, apples, mint and green onion and stir to combine.
In small bowl, whisk canola oil, vinegar, apple juice, honey and ginger together. Pour over salad. Flavours improve if salad is refrigerated for up to 4 hours prior to serving.