Preheat your oven to 375°F (190°C).
Spray a a large skillet with cooking spray and place over medium heat. Add the chopped onion and garlic, and sauté until they become translucent, about 2-3 minutes.
Add the chopped spinach to the skillet and cook until wilted, about 2-3 minutes. Remove from heat and allow it to cool slightly.
In a large mixing bowl, combine the feta cheese, Parmesan cheese, low-fat ricotta cheese, beaten eggs, nutmeg, salt, and pepper. Mix well.
Add the cooked spinach mixture to the cheese and egg mixture. Stir until everything is well combined.
Lay one sheet of phyllo dough on a clean, dry surface. Lightly coat it with cooking spray. Place another sheet of phyllo dough on top and repeat until you have four sheets stacked on each other, with a coating of cooking spray between each layer. Repeat this process to create another stack of four sheets.
Carefully place one stack of phyllo sheets into a pie dish, allowing the edges to hang over the sides. Add the spinach and cheese filling evenly over the phyllo sheets in the pie dish.
Place the second stack of phyllo sheets on top of the filling, again allowing the edges to hang over the sides. Fold the overhanging phyllo dough sheets inwards to create a border around the pie. Lightly coat the top of the pie with cooking spray
Bake in the preheated oven for about 30 minutes or until the phyllo dough is golden brown and the filling is set.
Remove the pie from the oven and let it cool for a few minutes before slicing and serving.
Cut this spinach and feta quiche into 4 big slices. Each slice is only 4 Points on Weight Watchers. This is perfect for breakfast, a light meal or as a side dish. Enjoy!