Aubergine and feta tart

Name: Aubergine and feta tart
Ingredients: 2 aubergines (about 300g/10½oz), ends trimmed and thinly sliced lengthways; 100ml/3½fl oz olive oil, plus extra for drizzling; 320g pack ready-rolled puff pastry; 1 small free-range egg, lightly beaten; 4 tbsp sun-dried tomato paste; 2 garlic cloves, chopped; 1 tsp dried basil; 100g/3½oz feta; salt and freshly ground black pepper; handful fresh basil leaves, torn, to serve; 5 garlic cloves; 150ml/5fl oz olive oil; 50ml/2fl oz balsamic vinegar; 1 tbsp full-fat mayonnaise; 4 large handfuls rocket or mixed leaf salad; 1 small red onion, thinly sliced; 50g/1¾oz pine nuts, toasted