Balsamic chicken and pumpkin salad

Ingredients (4 servings): 2 chicken breast fillets, trimmed 1½ tablespoons olive oil ¼ cup balsamic vinegar 350g butternut pumpkin, peeled, cut into 2cm pieces 100g baby rocket 200g grape tomatoes, halved ½ x 400g can butter beans, drained, rinsed ½ medium red onion, thinly sliced   Method: Preheat oven to 220°C/200°C fan-forced. Line a large…