I'm not aware of any specific recipe or technique for creating a Board PNG aesthetic minimalist background. However, I can suggest some possible approaches to achieve a similar look.

One way to create a minimalist background is to use a simple color scheme and a subtle texture. You can try using a tool like Adobe Photoshop or GIMP to create a custom background image.

Here's a brief snippet of code that uses the postcss-initial plugin to fallback initial keyword:

/* postcss-initial.css */
@import 'postcss-initial';

body {
  @initial-color: #f7f7f7;
}

This code sets the initial color to a light gray, which can be used as a background color.

Another approach is to use a tool like locate-app to find the executable of a known app (e.g. Chrome or Firefox) and then use its icon as a background image. However, this method may not work for all apps and platforms.

If you're looking for inspiration, you can try searching for "minimalist background" or "board png aesthetic" on design websites like Dribbble or Behance.