rspec users - May 2011 - [rails] cannot find id

No idea why this is not working:

describe "stub_model(Food) with a hash of stubs" do
     let(:food) do
       stub_model Food
     end
   
     
   it "edit action should render edit template" do
     get :edit, :id => food
     response.should render_template(:edit)
   end  

Says cannot find a food by id=....  I hard code the id and it still does not 
work.
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