chop the onion, squash the garlic put in a big ban on low and leave to sweat
get a mug. Put the oregano, marjoram, tomato puree and bay leaves in. fill the mug with hot water, stir. If you've time do this step the day before/ hour before to let the flavors infuse. If not it works all the same
get a heavy bottomed frying pan. Heat it up so its really hot. Put the meat in. Move it about and brown it all over. Once it's all brown add the mug of herbs. Keep it hot and simmering for 10 mins while stirring occasionally then and add the chopped tomatoes. Leave on simmer for 45 mins. Done. To freeze just wack it in a container (Preferably glass not plastic) either once it has cooled after cooking or the next days left overs after eating the night before.