Warm Kasha Chopped Salad

Ingredients

• 5 ounces baby arugula, chopped
• 1 1/2 cups diced red bell pepper
• 1 1/2 cups diced yellow or green bell pepper
• 1 1/2 cups diced celery
• 1 1/2 cups finely diced red onion
• 1 bunch scallions, thinly sliced
• 1/3 cup fresh lemon juice
• 1/4 cup unfiltered apple juice
• 1/4 cup walnut or hazelnut oil
• 2 teaspoons Dijon mustard
• 1 1/2 teaspoons sea salt, divided
• 1/2 teaspoon freshly ground black, white, green, and pink peppercorns
• 1 cup buckwheat groats (kasha)
• 1/2 cup toasted pumpkin seeds