Microwave is best
Just crack an egg into a mug and add a teaspoonful of water - whisk it with a fork in the mug and put in the microwave. I'd suggest 20 seconds at a time and a whisk with the fork each time. Stop cooking when it's still quite soft as it carries on cooking afterwards for another half a minute or so. It only takes about 30 to 40 seconds in total. No fat needed and best not to use any - I have never used any even for ours! For variation or a bit of a treat you can stir a little bit of grated cheese in after it's cooked. IT melts and sort of merges with the egg to make cheesy scrambled egg. I then put some on a teaspoon and wait till it's almost cold and then our hammy eats it off the teaspoon. The rest you need to eat yourself or it goes to waste! So sometimes I just give it to the hamster when I've made it for us.For us I just do a tablespoon of milk per egg plus an extra tablespooon - nothing fancy.