In medium-sized pot (with a lid you can use later), saute veg in oil over medium heat until starting to soften, approx 5 minutes. Add garlic and cook another minute. Stir in spices and cook another minute. Add pickled peppers and chickpeas, stir, and cook another minute. Add veg stock and bring to a boil, and remove from heat. Mix in couscous, flatten the top, cover and set 5-10 minute until liquid absorbed. Add lemon juice, zest, parsley and salt and pepper to taste. Fluff with a fork and serve with vegan sour cream or avocado if desired.