https://beechershandmadecheese.com/blogs/recipes/beechers-worlds-best-mac-cheese
FOUND: Gluten free Beecher’s Mac & Cheese available in the frozen foods department at Heinen’s.
Instructions on the box include preparation for oven baking and microwaving. I chose to preheat the oven to 375, separate the frozen block from its package, transfer the frozen product to a pyrex baking dish, covered and baked 30 minutes. I did check it after 20 minutes and mixed it all up a bit to even out the heating, then allowed it to finish the last 10 minutes. The pasta was nicely al dente, cheesy and a bit spicy.