ESP32-S3 SPI Slave Without Driver

[stepstools]

Is it possible/has someone already used the ESP32-S3 as an SPI slave without using the ESP-IDF driver? The driver has been giving me a lot of problems and seems to be overkill for what I need to do. Is there an interrupt that triggers when each byte transaction is complete? Are there registers I can read the received byte from and can write an output byte to? I basically just need to know when a new byte has arrived from the master, interpret that single byte, and then set the output byte based on that interpretation.