In a medium bowl, mix the ground turkey, minced onion, olive oil, chopped sundried tomatoes, feta cheese, breadcrumbs, egg, marjoram, salt, and pepper until just combined.
1 ½ pounds ground turkey, ½ small onion, 1 tablespoon olive oil, ½ cup sundried tomatoes, ½ cup feta cheese, ½ cup breadcrumbs, 1 large egg, 1 teaspoon marjoram, Salt and pepper