In a large pan, heat 1 tablespoon olive oil over medium heat. Add the onion, sprinkle with ¼ teaspoon salt, and sauté, stirring frequently, until translucent and cooked through, about 5-8 minutes.
Add an additional 1 tablespoon olive oil, garlic, and turkey. Sprinkle with an additional ¼ teaspoon salt, then sauté, stirring occasionally, until the turkey is browned and cooked through, about 5 minutes.
Add the cranberries, lime juice, and sage, stirring to combine.
Serve warm, wrapped in lettuce cups.