How do I create a view model for a populated drop down list in ASP.NET MVC 3

I'm trying to teach myself MVC3. Im converting from webforms.

I need to create a view model that includes a dropdown list that I can pass to the controller and eventually render in the View.

How can I accomplish this? I have the skeleton but I dont know what the code is to actually create the name value pairs for the view.

namespace DH.ViewModels
{
    public class SharedLayoutViewModel
    {
        public IEnumerable<SelectListItem> Products
        {
            //some code to setup the value/name pairs to be rendered in the view.
            //example: 
            //<option value="1">Mustard</option>
            //<option value="2">Ketchup</option>
            //<option value="3">Mayo</option>
            //<option value="4">Relish</option>
            //<option value="5">BBQ</option>
         }
     }
  }

Thanks