Fry the bacon in a skillet over medium-high heat until slightly crisp, about 8 minutes. Remove from the pan and cut into bite-size pieces.
In a separate pan, cook the onions in the butter over a low heat until caramelized, 20 to 30 minutes, stirring occasionally.
Use a fork to crumble the gorgonzola.
Put the bacon, caramelized onions and crumbled gorgonzola into separate bowls. Serve as delicious toppings for both sliders and macaroni cheese.