Asparagus and Sautéed Onions on Walnut Bread

At first glance, these may appear ambitious for sandwiches. But wait: The asparagus can be grilled or parboiled, if you'd rather not fire up the grill, and it can be done ahead of time. The sautéing of the onions takes all of 10 minutes.

Which leaves the walnut bread. Now that's what should you use your time looking for here.