When it comes to grilling ribs, like Bruce Aidells’ Margarita-Glazed Baby Back Ribs recipe, often the biggest challenge is how to fit the rib slabs on the grill. Ribs need to cook over indirect heat, so the section of the grate that’s over direct heat is out of bounds. On smaller grills, this means that fitting even two slabs can be tricky. Enter the rib rack. This low-tech gadget, which looks like a file folder organizer, holds the slabs in a vertical position, allowing you to cook as many as four slabs in the same space as two lying flat.