Add the water to the slow cooker, stir in the saffron and allow it to steep and infuse for 10 seconds.
Then add the rice, pesto, salt and pepper. Stir well.
Cover with a piece of foil, so that it's just touching the surface of the water. This will prevent the top of the rice from drying out, and allows the top to steam cook.
Cover with the lid. Cook on High for 1.5 to 2 hours.
Once the rice is cooked through use a fork to fluff up the grains.
If you wish, stir in some corn, spring onions, herbs or chopped peppers. And serve up as a side dish. Along with some cool plain yoghurt.