Upscale Macaroni and Cheese

Why I Love This Recipe
Bon Appetit
Ingredients You'll Need
2 T butter
3 L red bell peppers, cut into 1/2" pieces
5 celery stalks, chopped
1 1/2 c whipping cream
1 1/2 c half and half
1 lb blue cheese, crumbled (~ 4c)
1 t celery seeds
cayenne pepper
3 L egg yolks
1/2 c chopped celery leaves
1 lb penne pasta
3/4 c freshly grated Parmesan cheese