How can I make my own infused cooking oils?

This summer, my mother and I went to a craft fair and she was kind enough to buy me a bottle of lemon infused olive oil. It is, quite possibly, the most delicious cooking oil I have ever used. Lately, I’ve been using it for everything. I don’t much feel like shelling out the cash to buy infused cooking oils all the time they are considerably more expensive than regular cooking oils so I thought maybe I could make my own.

Can you tell me how or direct me to an appropriate resource, please?