Blend the cashews, oil, vinegar, dried herbs, garlic powder, honey, onion powder, black pepper and 1 cup water in a blender (preferably high-speed) until smooth; season to taste with salt and refrigerate until cold.
Bring a large pot of salted water to a boil. Add the macaroni and cook until al dente, about 10 minutes; rinse with cold water and drain. Spread evenly on a baking sheet, drizzle with oil and toss; let cool.
In a large bowl, toss together the cooled macaroni, tomatoes, kale, celery, corn and bell pepper. Add the dressing and toss to combine.