Chargrilled Aubergine Sandwich with Feta

Name: Chargrilled Aubergine Sandwich with Feta
Prep time: 10 min
Cook time: 10 min
Total time: 20 min
Cuisine: European, Mediterranean
Ingredients: 4 slices sourdough or baguette; 1 aubergine, thinly sliced lengthways; large handful baby spinach; 200g (7oz) feta cheese, thinly sliced; 85g (3½oz) bunch mint; 50g (2oz) whole blanched almonds, toasted; 1 garlic clove, peeled and chopped; juice 1 lemon; 2-3tbsp olive oil, plus extra