Rinse the chicken gizzards thoroughly and trim any excess fat.
Place gizzards in a small pot with water and a pinch of salt; simmer for 25 minutes until tender, then drain.
In a large skillet, heat the olive oil over medium heat and sauté the onion, bell pepper, carrots, and garlic until the vegetables are slightly softened.
Add the par-boiled gizzards to the skillet and sear for 3 minutes until golden brown.
Pour in the tomato puree, chicken broth, dried thyme, sea salt, and black pepper.
Reduce heat to low and simmer the sauce for 15 minutes, allowing the flavors to meld and the sauce to thicken.
While the sauce simmers, prepare the pearl couscous according to package directions using water or additional broth.
Fluff the couscous with a fork and serve in a shallow bowl topped with the braised gizzard sauce and fresh parsley.