Preheat the oven to 350 degree Fahrenheit and place a butter paper/parchement in cake pan and butter/spray the cake pan (original recipe called for pie dish, I didn't have pie dish so I used my 9 inch cake pan instead). I cut the parchment more than dimension of cake pan as I was worried about unfolding the quiche but it was very easy so its not required

Wash and rinse the quinoa. In a sauce pan add quinoa and water and bring to boil on medium heat. Simmer and cook till its done; switch off and set aside

In a separate pan add little olive oil and sauté the onions on medium heat till its done. Add Brown sugar and mix well, and cook for 30 seconds and switch off

Set aside. Meanwhile, start to caramelize the onions. Heat the olive oil in a large saute on medium heat. When the oil is shimmering, add the onions. Slowly cook until the onions are soft and browned. Remove the onions from the pan, and place them in a large mixing bowl

Rinse the spinach well in water. Boil water with pinch of sugar and salt. Add the spinach to the boiling water. Cook and switch off the flame, after 3-5 mins drain and quickly pour cold water over the spinach. Allow the spinach to cool and squeeze out all extra liquid using hand/sieve/ clean dish towel (I used my hands as it wotk best). Add the spinach, cooked quinoa, cream cheese and cheddar to the mixing bowl and combine well

In a separate small bowl whisk the eggs and beat well; add it to the quinoa-spinach mixture along with salt and pepper. Mix gently untill everything is combined

Pour the mixture in the prepared cake pan. Bake for about 44- 46 minutes (mine got done after 44 minutes) until the top is golden and the quiche has started to pull away from the edge of the baking dish. Serve it hot/warm according to the preference