Melt white chocolate in a medium heatproof bowl in the microwave on low power setting in 30-second intervals, stirring in between, until the chocolate is smooth and completely melted. Set aside. (Alternatively, use a double boiler.)
Place heavy cream and sugar in the chilled bowl and whisk on high-speed until stiff peaks form. By hand, fold in 1/4 of the whipped cream into the melted white chocolate until smooth and completely incorporated. Add the combined whipped cream and chocolate to the remaining whipped cream and use a rubber spatula to fold together.
Purée or mash berries with the honey, lemon juice, and liqueur.
Layer berries between layers of mousse; fold lightly into mousse for a marbled effect; or drizzle berries over top in pretty glass cups or dishes. They all look and taste terrific. A fresh mint leaf makes this really pop.