Heat olive oil in a large sauté pan over medium heat. Add ground turkey to the pan, breaking it apart with a wooden spoon. Cook until browned and no longer pink, about 5–7 minutes.
Add sliced onion, minced garlic, and chopped scallions to the pan. Sauté until the onions are translucent, about 3 minutes.
Stir in thyme leaves, diced tomatoes, and chopped scotch bonnet pepper. Cook for another 2–3 minutes until the tomatoes soften.
Season with black pepper and salt to taste.
Add chopped callaloo leaves to the pan. Stir well to combine all ingredients.
Cover the pan and let the callaloo steam until wilted and tender, about 5–7 minutes.
Remove the lid, stir the mixture, and cook uncovered for an additional 2 minutes to evaporate any excess liquid.
Taste and adjust seasoning if necessary. Serve hot.