Tuna, napa cabbage, and colorful vegetables get a sweet-and-spicy Asian-style dressing for a main-dish salad that's perfect for warm summer days.
Combine cabbage, tuna, sweet pepper, pea pods, and green onion in a very large bowl. Gently toss to mix.
For dressing, combine rice vinegar, sugar, soy sauce, toasted sesame oil, ginger, and crushed red pepper in a screw-top jar. Cover and shake well.
Pour dressing over cabbage mixture; toss to coat. Serve immediately or cover and chill up to 12 hours. Sprinkle with cashews before serving.