For you who want to enjoy coffee without getting insomnia and palpitation. You can make coffee from pistachio nuts. the other way is to decaffeinated coffee. But the price of free caffeine coffee is more expensive than the regular one.
Pisthacio Nuts is from Pistacia terebinthus plant that usually found in middle east. The bean seed is look as almond that often used to be souvenirs or snacks in Arab.
Recent study from York University said that the bean can substitute coffee beans, with same process such as heated to 200 degrees for 10 to 20 minutes, then ground and brewed with hot water like the normal coffee.
PS: the frying process of Pistachio Nuts seed, it can be modified to get another different flavors.