Preheat your oven to 400°.
And, as that warms up, take 3 tablespoons of your cannabis-infused butter, and thoroughly grease up a medium-sized casserole dish.
After that, take roughly half of your potatoes, place them in the bottom of that previously-buttered casserole dish. On top of that layer of potatoes, place your onion slices, followed by the rest of your delectable spuds. Top the whole thing off with your desired amount of salt and pepper.
Then, in a substantially-sized saucepan, melt the rest of your cannabis-infused butter over “Medium” heat.
Once that’s fully melted, mix in your flour and a little bit of salt. Keep stirring up those elements with a trusty whisk for at least 60 seconds. After which, you can stir in your milk.
When you’ve completed that step, allow the contents to cook until the entire batch starts to thicken up. The second you see that happen, stir in all of your cheese, and keep that consistent stirring motion going, until all of that mouth-watering cheese has fully melted, which in my experience, doesn’t take longer than a minute or so.
Take that succulent cheese mixture, and gradually pour it over all of your potatoes in the casserole dish, before covering everything with some handy-dandy aluminum foil.
At this point, your oven should be good to go. If it is, toss these potatoes in there for about 1 ½ hours to bake.
When that time period has elapsed, grab roughly a quarter portion of that entire batch of potatoes, plop it onto a plate, pick up a fork, and start eating!