Combine mayonnaise, basil, and chives, stirring with a whisk; spread mayonnaise mixture over top half of baguette. Spread 1/4 cup Green Pea Spread over bottom half of baguette, and top with Simple Roasted Leg of Lamb, radishes, and top half of baguette. Cut crosswise into 4 pieces. Wrap sandwiches in foil or parchment paper; chill.
Note: Nutritional analysis includes Green Pea Spread.