Preheat the oven to 200°C.
Cut the pears into large slices and place them in a baking dish with 2 tablespoons of olive oil, the balsamic vinegar and the sugar.
Toss gently to coat. Roast for approximately 20 minutes or until the pears are golden. Set aside to cool.
Place the lentils in a large pan of water. Bring to the boil, reduce heat to medium and simmer for 20 minutes or until lentils are cooked. Drain and set aside.
Place the pears, lentils, rocket and hazelnuts in a large bowl and toss gently to combine. Season with salt and pepper and drizzle with a little olive oil.
Crumble the cheese over the top and serve warm.