In a large bowl, combine the chopped roasted chicken, chopped green onion, and chopped smoked almonds.
Stir in the plain yogurt, mayonnaise, Dijon mustard, chopped rosemary, salt, and freshly ground black pepper until the mixture is evenly coated.
Cover the bowl and chill the chicken salad in the refrigerator for about 1 hour.
Divide the chilled chicken mixture evenly among 5 slices of bread.
Top each with a lettuce leaf and place the remaining bread slices on top to form sandwiches.
Cut each sandwich diagonally and serve.