Pester How do I mock up an object to be used as a paramater

How do I mock up an object so that I can pass it to the method that I want to test. The mocked object needs to have methods of its own that I would want to mock the output of. A simple example can be found below.

Function Method-ToTest ($obj, $value)
{
  $obj.Method($value)
}

Describe “Method-ToTest” {
  Mock $obj = 
  It “Calls tMethod to test” {
     Method-ToTest $obj | Should Be $true
  }
}