I use a coffee roasting machine Similar to this one: https://www.amazon.com/Capacity-Electric-Multifunctional-Chestnuts-Non-Stick/dp/B08LH861NQ/ref=sr_1_4?dchild=1&keywords=coffee+roaster&qid=1615649487&sr=8-4 I roast only 4/10 Lb at a time, which lasts me about 5 days. I roast the beans at 240 Celsius for around 15 minutes, which is just the start of the second crack. The only bad thing about the roaster is that there's no control over the smoke generated. I pour the roasted beans in a steel bowl, and stir the contents in the kitchen sink with cold water in it, which cools the beans enough in three minutes to place the beans in a glass container.