ROASTED AUBERGINE SALAD WITH WHEATBERRIES

• 1 aubergine, cut into 1.5cm-thick rounds • 11⁄2 tbsp olive oil • 1 tbsp tahini • 1⁄2 orange, juice • 1⁄2 small garlic clove, finely grated • 300g pack Waitrose & Partners Wheatberries, Lentils & Green Vegetables • 10 mint leaves, shredded • 1 salad onion, finely sliced • 50g pomegranate seeds