Preheat the oven to 350°F. Line a baking sheet with parchment paper, then spray lightly with nonstick cooking spray.

Heat the oil in a medium skillet over medium heat. Add the onion and cook, stirring often, until translucent, 7 to 8 minutes. Add the bay leaf, garlic, bell pepper, parsley, and thyme. Cook, stirring often, until tender, about 5 minutes. Remove from the heat and let the mixture cool. Remove and discard the bay leaf.

In a large bowl, combine the turkey, eggs, breadcrumbs, Worcestershire sauce, cooled vegetables, salt, black pepper, and ½ cup ketchup. Use your hands to mix until just combined; take care not to overmix, as this will result in a tough meatloaf. Transfer the mixture to the center of the prepared baking sheet and form into a loaf. Coat the meatloaf in the remaining ½ cup ketchup. Bake until the meatloaf is firm and cooked through, 1 to 1½ hours. Let stand for 5 minutes before slicing and serving.