Hawaii Five-Oh Sammies

We checked out a book from the library called Super Sandwiches by Rose Dunnington. Anya's had a blast going through the book and "taking notes" on her favorites. Today we finally got around to trying one! And it was delicious... although the kids were a little skeptical of the leaves (i.e. spinach).

1/4 cup brown sugar
1/2 t cinnamon
1/4 t chili powder
3/4 t vanilla extract
1 peeled and cored pineapple (use 5 thick slices)
5 onion rolls
5 slices swiss cheese (large enough to cover bottom of roll)
5 thick ham slices (or 10 thin ones)
spinach leaves
Dijon Mustard

Combine brown sugar, cinnamon, chili powder, and vanilla in a plastic container or bag. Marinate the pineapple for as long as it takes for oven to heat up to 425.
Arrange pineapple slices on greased baking sheet. Roast 10-12 minutes on each side until golden brown. During the last 5 minutes, heat up the buns in the oven. Put the ham and swiss on the bottom buns (so the cheese melts and the meat warms).
After removing from oven, assemble your sandwiches!