In a bowl, mix up the eggplant ingredients and using a pastry brush, brush the olive oil mixture onto the eggplant. Roast in the oven for about 35-40 minutes or until soft.
To make the herby yogurt: Add all the ingredients into a bowl and mix. Place back in the fridge until ready to serve.
Filling: Cook the lentils according to the package. Season with a dash of salt and set aside.
In a mini food processor, add the walnuts and sunflowers seeds and chop. Do not over-process or it'll turn into flour. Make sure it's somewhat chunky.
Add the nuts in a small pan with 1 tbsp of olive oil. Toast for about 3-5 minutes and add a pinch of salt and a pinch of za'atar for taste.
Assemble: Start with the eggplant, then layer the lentils. Top it with the za'atar nut mixture and then the herby yogurt. Then, top with more fresh herbs.