Begin by washing and chopping your vegetables. Dice the carrots, zucchini, and eggplant, and coarsely chop the leeks and grilled peppers. Set aside.
In a large pot, heat the extra virgin olive oil over medium heat. Add the crushed garlic and sauté for about 1 minute until fragrant, being careful not to let it burn.
Add the chopped leeks, carrots, zucchini, and eggplant to the pot. Sauté for approximately 5-7 minutes, or until the vegetables are tender and slightly caramelized. Stir occasionally to ensure even cooking.
Stir in the coarsely chopped grilled peppers and cook for an additional 2 minutes, allowing their flavors to meld with the other vegetables.
Pour in the vegetable broth and bring the mixture to a gentle boil. Once boiling, add the dry couscous and ground black pepper. Stir well, then cover the pot and remove it from heat. Let it sit for about 5 minutes to allow the couscous to absorb the liquid.
After 5 minutes, uncover the pot and fluff the couscous with a fork. Taste and adjust seasoning if necessary. Garnish with freshly chopped parsley before serving.