When your boss says "Please create a presentation with the strategic plan for the management meeting next week", she means "Please finalise the strategic plan and find a way to communicate it to the management team next week".
Creating substance and presenting it are 2 different things.
- For a strategic plan, getting agreement on the substance is probably easiest to do on a few dense pages, maybe even in Excel that you can go over with your boss.
- Once that is set, the question becomes how to present it. For an internal audience who are pretty familiar with the company, this probably involves highlighting the bits that are different from last year, and putting that dense Excel in a slightly better layout as an appendix in the back.