Preheat the oven to 375°F (190°C).
In a large bowl, mix the shrimp, onion, garlic, carrots, potatoes, and bell peppers.
In a small bowl, mix the cumin, coriander, paprika, ginger, cinnamon, and turmeric.
Add the spice mix to the large bowl of vegetables and shrimp, and toss to coat evenly.
In a large oven-safe pot or tagine, heat the olive oil over medium-high heat.
Add the shrimp and vegetable mixture to the pot and cook for about 5 minutes, stirring occasionally.
Pour in the broth and add the chopped parsley, cilantro, and preserved lemons.
Season with salt and pepper to taste.
Cover the pot with a lid or aluminum foil and bake for 40-45 minutes, or until the vegetables are tender and the shrimp is cooked through.
Serve hot with couscous or bread.