Napa Cabbage and Red Onion Salad

Ingredients

• 1 small or 1/2 medium large red onion (1/4 pound)
• 2 teaspoons salt, or to taste
• 2 cups shredded Napa cabbage
• 2 teaspoons roasted sesame oil, or to taste
• 1 tablespoon minced ginger
• 1 tablespoon rice vinegar, or to taste
• About 1/2 cup coriander leaves