A bit of lumber and some inexpensive hardware can turn that gap into a pull-out pantry ... and below the cabinet in addition to a couple of wheels? This would help keep the pantry from scraping ...

Assemble A Thin, Rolling Bookshelf To Slide Into Narrow Spaces If your kitchen has some gaps between appliances, cabinets, and walls, you can DIY rolling, pull-out pantry storage to make use of ...

One option is to update your kitchen with larger or more cabinets to accommodate the storage you need. Or add a walk-in ...