Cook the bacon according to the package.

While the bacon cooks, core the apple and then cut the apple HORIZONTALLY into thin, but sturdy strips- you should get 6 slices (not including apple top and bottom pieces). (If you don't have an apple corer, cut the apple horizontally into the slices, then cut out the core in each slice by knife.)

Assemble the sandwich by putting the roast beef, bacon, avocado, and a drizzle of basil paste in between every 2 apple slices. Serve.