Mix together in a small bowl the vinegar, olive oil, honey and salt. In a large bowl toss together the grilled pork, wild rice, black walnuts, onions, shiitake mushrooms and pineapple tidbits; add vinegar mixture and toss to coat evenly. Arrange spinach on large serving platter; top with pork mixture. Garnish with raspberries and mango or papaya. Serve.