Heat the oil in a large pot at medium heat
When the oil is hot, sauté the onions
Add beef pieces and garlic, stir fry until brown
Add pumpkin, potatoes and carrot, stirring for about 3-5 minutes
Add quinoa and the water/beef stock, and bring to boil
Once boiling, lower the heat and put the cover on, allowing the stew to simmer until quinoa absorbs most of the liquid (I leave it to simmer for about 45 minutes - 1 hour, checking it every 15 minutes or so to ensure the bottom isn't burning)
Once the quinoa has absorbed the liquid and the meat is tender, stir in the spinach. Put the cover of the pot on, and turn off the heat
Wait for it to cool, then mash or puree to desired consistency and freeze in 75ml portions
Add greek yoghurt, cheese, capsicum, zucchini, or tomatoes to change up the flavour or texture when serving