Dissolve the jello in one cup of boiling water. The normal recipe
then calls for an additional cup of cold water. I try to minimize the
water in this phase to make the jello thicker, maybe to 1/2 cup.
Drain pineapple juice from can, leaving pineapples IN the can. Pour in
some of the lime jello. Use a fork to get to the bottom of the slices
and raise them up from the bottom so that the jello will go UNDER the
pile as well as around it.
Now pour in rest of jello, shaking the can to get it to surround the slices.
Cover the top of the slices.
Refrigerate for several hours. Turn out onto a plate as a molded
cylinder, and serve by slicing between the pineapple slices.