Prepare Quinoa and Lentils: In a large pot, combine quinoa, lentils, and water. Bring to a boil, then reduce heat and simmer until both are cooked and tender, about 20-25 minutes.
Cook Squash and Chickpeas: In a separate pot, boil the butternut squash until tender. Drain and set aside. If using uncooked chickpeas, cook them until they are soft.
Combine Ingredients: Once the quinoa and lentils are cooked, add the cooked butternut squash, chickpeas, mixed vegetables, mashed sweet potato, pumpkin puree, blueberries, and ground flaxseed to the pot. Stir well to combine.
Add Greens and Nutritional Yeast: If using, add the chopped kale or spinach and nutritional yeast. Stir until the greens are wilted.
Cool and Store: Allow the mixture to cool completely. Portion the food into containers with tight lids and refrigerate or freeze for future use.