In the meanwhile, preheat large deep skillet on low - medium heat and add olive oil. Add onion and garlic, saute until translucent, stirring occasionally. Add pumpkin puree, chicken stock, salt, pepper and bring to a boil. Reduce heat to low and let the sauce simmer for 5 minutes uncovered.
Stir in Parmesan cheese until melted. Remove from heat and add quinoa and spinach. Stir gently to combine. Adjust thickness with extra chicken stock if desired. I like my quinoa saucy and hot. Because of Parmesan cheese, liquid separation with time is normal. Just give it a good stir. Serve hot.
Notes
Store: Refrigerate in an airtight container for up to 3 - 4 days.