This is a mod that I haven't seen before. I made a shelf to fit into the window, with fold-down legs, the same as the ones that are used for extra counter space in
Escape trailers. The nice thing is, it folds down (relatively) flat to save space.
I may add side rails, so that the cup of coffee or English muffin don't slide off the sides in the morning. This is 12" x 7.5". (It is a surprise anniversary present for my spouse. Don't tell.)
Best regards from Pittsburgh,
David (and Jon)
Pittsburgh, PA