Heat oven to 200C/180C fan/gas 6.
Place the eggplant, onion, pepper, garlic with skin on in a baking tray.
Drizzle 1 tbsp of olive oil, salt and black pepper.
Roast for about 25 minutes.
In a pan, add 1 tbsp of olive oil and saute chopped garlic.
Add stock and season with salt and pepper.
Once the stock comes to a boil, add couscous. Cover the pot and switch off the flame.
Let this remain for 10 minutes.
After 10 minutes, fluff the couscous with a fork and mix in the roasted vegetables.
Mix in the lemon juice and lemon zest.
Crumble the feta into the couscous salad and mix well.
Top with mint/cilantro leaves and sliced green chili.