Place loaf pan in freezer.
In a large bowl, whisk together condensed milk, honey, matcha, Passionfruit Flavour, and salt until dissolved.
In bowl, beat cream using an electric mixer starting on medium-low to medium-high until stiff peaks form. Fold one-third into matcha mixture until no streaks remain; fold in remaining whipped cream.
Spoon half of ice cream mixture into loaf pan; sprinkle with pistachios and chocolate over the top (if using). Freeze for at least 6 hours.