Dear Jane, Trianglen RS3, Epicenter

Loads of appliqué with appliqué on appliqué

I cut the background triangle larger than pattern.pueced the centre triangle to the background

Then added the two sides and top

You can see the excess I have allowed here 

Then I drew the outline for the appliqué 

Ten appliquéd the centre diamonds first

Then the melons around the centre

And finally the 3 bottom diamonds

Then I trimmed the entire triangle to the dear  jane triangle