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Preheat oven to 350 degrees F. Caramelize the mold. Put about 1 cup of sugar in saucepan, then turn the pan gently until the sugar turns amber colored. Pour caramel into the mold spreading it evenly over the sides and bottom by tipping the mold.
Beat eggs and egg yolks. Add milk and 3/4 cup of sugar. Add salt, vanilla, cinnamon and lime rind.
Pour mixture into mold, cover with foil paper, and place mold in a larger pan and fill larger pan with enough hot water to cover half way up the mold.
Bake 1 1/4 hours. Remove mold from hot water and cool. Refrigerate.
When ready to serve turn the flan over onto a plate, slice it, and spoon the cara-mel over the flan.