As part of your project, you are tasked with creating a CloudFormation template to deploy a Content Management System (CMS) application that runs on an EC2 instance within your AWS account. Given that this application will be deployed across multiple AWS regions, you need to generate a map that includes all the possible values for the base Amazon Machine Images (AMIs) specific to each region.

What is the method you would use to invoke the !FindInMap function to accomplish this objective?