By Lauren Welch & Joseph Wilkes Meghan Markle “sourced jam in Montecito and lovingly made it by hand” a PR expert has claimed, as she gave her take on the Duchess’s first product launch under her brand, American Riviera Orchard. Earlier this week the Duchess of Sussex sent 50 influencers a jar of strawberry jam “sourced in Montecito”. PR expert Megan Boyle, who is head of digital PR at TAL Agency, is convinced that Meghan handmade the jam herself. But she pointed out that there may be a catch, as if she decides to expand and mass produce the conserve in the future, she’ll have to stop hand mak…