Freeze fresh herbs in olive oil! Add the cubes to pasta/potato dishes, soups, or roasting onions, garlic, veggies. What a great way to preserve fresh herbs from your own garden!
The whole window will have a one foot wide window sill. I will have to show you the place to get a good idea of things. Basil planted in teacups for the kitchen, cheap and pretty teacups planted with fresh herbs on the window sill.