First, I would gather as much information as possible about the Martian soil and atmosphere to determine if it could support plant life. I'd need to conduct experiments on this soil, focusing on factors like water availability, oxygen levels, and temperature. Using resources at my disposal, such as recycled waste, I would create a suitable planting environment. If the native soil proves unsuitable or lacking in necessary nutrients, I'd consider hydroponics or other alternative growing methods to provide sustenance.
Imagine you're an astronaut stranded on Mars. How would you figure out how to grow plants there, to ensure your survival?