Is it possible in Stripe to add a one off payment to a subscription, without creating a dedicated plan?
Except, as well as bananas you could add almost any number of any other type of fruit, then the following month go straight back to being signed up for your bag of apples.
I could charge the card the difference, but with the subscription going out on a set day each month and it might make for a messy bank statement. I'm using Laravel with Cashier at the moment.