ESP32-AT Redirect incomming data from UART to SPI

[Neorim]

Hello,

I am currently working on a project where there is going to be transmitted high amount of data trough the ESP32 to a secondary MCU.
Because of the high amount of data, it would be preferable to transmit the incoming data through SPI instead of UART.
My question is therefore how to redirect the incoming data to an SPI interface.
I have not been able to find any example on this, though the README file for the AT firmware states that it is possible.

Can anybody give me some pointers on how to achieve this?

Best Regards
Neorim