Preheat & Prep: Preheat your oven to 350°F (175°C). Grease a 9-inch pie dish or a springform pan thoroughly with butter or non-stick spray.
Mix the Base: In a large bowl, whisk the eggs until well-beaten. Stir in the cottage cheese, melted butter, salt, pepper, and herbs.
Combine Dry Ingredients: Slowly whisk in the flour and baking powder until the batter is smooth and no large lumps remain.
Fold in the Goods: Fold in the chopped spinach and shredded cheese. Mix until everything is evenly distributed.
Bake: Pour the mixture into your prepared dish. Bake for 35 to 45 minutes, or until the center is set and the top is a beautiful golden brown.
Rest: Let the quiche sit for 10 minutes before slicing. This allows the protein to set so you get those clean, cafe-style wedges.
Pro Tips for the Best Texture
Squeeze the Spinach: If you use frozen spinach instead of fresh, make sure to thaw it and squeeze out every drop of water, otherwise, the quiche will be soggy.
The “Jiggle” Test: Give the pan a gentle shake. The edges should be firm, but the very center should have a slight, stable jiggle.
Add-ins: Feel free to throw in some sautéed mushrooms, diced ham, or feta cheese if you want to kick the flavor up a notch.