Veggie moussaka - Good Food Middle East

Ingredients

• 140g dried green lentils
• 2 onions, halved and sliced
• 2 garlic cloves, chopped
• 2 bay leaves
• 1 tsp dried oregano
• ½ tsp cinnamon
• ½ tsp allspice
• 400g can chopped tomatoes
• 1 reduced-salt vegetable stock cube
• 200g sweet potatoes, thinly sliced
• 1 large aubergine, sliced and the biggest slices halved again
• 250g low-fat fromage frais
• 1 large egg
• 50g feta cheese, crumbled
• 4 tomatoes, thickly sliced