See Below

Wash and peel oranges. Cut peel into strips. Trim the white part if
it is especially thick, or just use different oranges. Some white is
fine. Let peel strips dry for a day.

Blanch the strips and discard the water. If the blanching water is
very bitter, repeat this step onc e more. Cook the strips in sugar
syrup til they begin to look translucent. Remove to a rack placed
over waxed paper to catch the drips and let dry. When dry, dip 3/4ths
of each strip into melted, tempered bittersweet chocolate and return
to the rack.

Sorry this isnt a more precise recipe, but thats how it is with
grandmothers.