Add everything except panko and butter to a lidded oven/broiler safe dish. (I used a 4 quart enameled cast iron), and stir well. Push everything down so it's all wet.
Bake COVERED at 350 degrees for 45 minutes.
Remove from oven and stir - if you want traditional mac and cheese, serve now! BUT if you want baked style, continue to the next step.
In a small bowl, stir together panko and melted butter then sprinkle over top of mac and cheese.
Return to lower/middle rack of oven UNcovered, and broil for 3 minutes until panko is golden brown.
I used a 4 court enameled cast iron dutch oven: DUTCH OVEN
It is important to use block cheese that you shred yourself, not pre-shredded cheese, to avoid the addition of caking agents in your mac and cheese. Caking agents will not allow the cheese to melt smoothly.
Mac and Cheese https://www.mamalovesfood.com/mac-and-cheese/