Cook rice until tender (up to 60 minutes). Cook snow pears in boiling water until tender, 2 to 3 minutes, and drain well. Cut into 1/2-inch diagonal pieces. Slice scallion in 1/4-inch rings. Separate cashews into halves.

In a small jar, combine garlic, ginger, soy, vinegar, and oil and shake to combine. Toss together rice and vegetables, and half the nuts; dress and toss to coat. Taste and season with salt and pepper if necessary. Serve at room temperature and garnish with remaining cashews and fresh cilantro leaves.