Adding a little rapeseed oil to your wok or frying pan, make sure the oil is hot before adding the vegetables, but keep the heat on moderate or you could burn them easily.
Add all the vegetables, garlic and some salt & pepper to the pan. Use a flipper or wooden spoon to turn them over every 15 - 30 seconds until they are ready.
Notes
Again, I don't put quantities for this as it's more dependent on what you have in your fridge to use up.