A piping bag fitted with a star tip or a pastry bag will give you the prettiest results or, if you don’t have one, you can use a Ziploc bag with the corner snipped off. A third option is to use a couple of teaspoons to add the filling. This won’t look as elegant but if you use a large piece of red pepper and a whole herb sprig or large leaf as your garnish, not much of the filling will be visible - and they’ll still taste just as delicious.