Present Simple VS Present Progressive (present continuous)

My favorite thing to do this time of year and the reason is simple, delicious, healthy and soothing. If you have never had fresh, homemade grape juice, I assure you, you are missing out; it's nothing like anything you can buy in a store! It's more like nectar than store bought juice, thick and smooth. Cook the grapes: Put the mashed grapes into a large stockpot. Slowly heat the grapes and juice to a simmer on medium heat, and then simmer for 10 minutes. Stir occasionally so that the grapes don't