Preheat the oven to 425°F. Line a baking sheet with parchment paper.
Slice the tempeh into thin strips and then into chunks. Place the tempeh in a medium bowl and toss with BBQ sauce to coat.
Spread the BBQ-coated tempeh in an even layer on a baking sheet. Bake 20-25 minutes, until browned and slightly crispy, turning halfway through.
In a high-speed blender or mini food processor, combine 1/4 cup water, lemon juice, cashews, Dijon mustard, white miso paste, garlic, sea salt, and black pepper. Blend until smooth and adjust seasoning to taste.
In a large bowl, add the chopped kale and drizzle with olive oil. Massage the kale leaves until evenly coated.
Add the sliced Brussels sprouts and capers to the kale. Toss with the desired amount of dressing.
Divide the salad evenly between large dinner bowls and top with the BBQ tempeh. Serve immediately.