Preheat the oven to 200°
Cut the bell peppers in half, remove stems, seeds and membranes. Place the peppers on a parchment paper lined baking tray with the cut side down. Rub with 1 tsp of olive oil, then roast for 40 minutes until the skins are very dark and blistered.
Now transfer the peppers to a bowl and cover it with plastic wrap. Wait ten minutes, remove the wrap and let cool a few more minutes before removing the skin.
Reduce the heat to 160°. Spread the walnuts on another parchment paper lined baking tray and toast for 7 minutes max, as the nuts should not burn. Set aside to cool.
In a food processor blitz the garlic until finely chopped. Add peppers, walnuts, olive oil, spices and lemon juice and blitz until your preferred consistency. Season with salt to taste. Garnish with a few walnut chunks and parsley.
Enjoy!