I've had good luck with these:
https://flatbike.com/product/wellgo-flat-pop-off-pedals/They pop off quickly so your bike will fold super flat. Only two disadvantages:
1. Once, these seemed to constantly get 'stuck'. Problem solved with a good oiling, but it was a pain figuring out why I wasn't able to remove the.
2. Rarely, but still possible: you can accidentally kick the unlocking mechanism in such a way that the pedal will drop off. A pain, but I just walked back 10 feet and popped it back on.
Solidly built and all metal construction - pretty cool looking as well. Absent the two disadvantages above, these are recommended for use with RadMini ST.