Pre-heat the oven to 375°F.
Using butter, grease a 24 mini-muffin pan; set aside.
In a medium skillet, over medium heat, heat the 1 tbsp. of canola oil; add the yellow and green onions; cook until soft.
While the onions are cooking, mix together the spinach, feta, ricotta and eggs; add the cooked onion; season with salt, pepper and nutmeg; combine well and set aside.
Take the phyllo from the package and roll out flat; cover with a clean damp tea towel.
Remove one sheet and lay flat on the counter; brush with the melted butter.
Lay on another sheet of phyllo.
With a pizza cutter or sharp knife cut into 2-inch pieces.
Place each square in a cup of the mini-muffin pan and lightly brush with butter.
Repeat the layers two more times, for each cup, off setting the squares slightly.
At this point, three squares have been placed in each cup with a total of 6 individual sheets of phyllo.
Place a tsp. of the spinach mixture in each cup and top with a pinch of Parmesan.
Place in the pre-heated oven and bake for 15 - 20 min. until golden brown.
Remove from the oven and serve immediately or allow to cool before placing in an airtight container and freezing.