FIRST STEP: PREPARE THE SPINACH AND ONIONS

1. Sauté the Vegetables: In a large skillet, heat 1 tablespoon of olive oil over medium heat. Add the chopped onion and sauté until soft and translucent, about 3-4 minutes.
2. Add the Spinach: Add the spinach to the skillet and cook until wilted, about 2-3 minutes. Stir occasionally to ensure the spinach cooks evenly. If using other vegetables like bell peppers or mushrooms, add them at this stage and cook until tender.
3. Season the Vegetables: Sprinkle a pinch of salt, pepper, and garlic powder into the vegetable mixture to enhance the flavor. Once cooked, remove the skillet from the heat and set it aside to cool.

SECOND STEP: MAKE THE QUICHE MIXTURE

1. Combine the Wet Ingredients: In a large mixing bowl, whisk together the eggs, milk, and cottage cheese. You can use a hand whisk or an electric mixer for smoothness.
2. Add the Dry Ingredients: Stir in the dried oregano, and season with salt and pepper to taste. Mix well until the ingredients are fully incorporated.
3. Incorporate the Cheeses: Add the shredded cheddar cheese to the egg mixture and stir to combine. If you’re using other cheeses, like feta or mozzarella, now is the time to add them.

THIRD STEP: ASSEMBLE THE QUICHE

1. Combine Vegetables and Quiche Mixture: Add the sautéed spinach and onion mixture to the egg and cheese mixture. Stir everything together gently to evenly distribute the vegetables throughout the filling.
2. Prepare the Baking Dish: Grease a 9-inch pie dish or quiche dish with cooking spray or a little extra olive oil to prevent sticking.
3. Pour the Mixture: Carefully pour the quiche mixture into the prepared baking dish, spreading it out evenly.

FOURTH STEP: BAKE THE QUICHE

1. Bake the Quiche: Preheat your oven to 350°F (175°C). Place the quiche in the oven and bake for 40-45 minutes, or until the quiche is set in the center and lightly golden on top. You can test doneness by inserting a toothpick or knife into the center—if it comes out clean, the quiche is ready.
2. Cool and Slice: Once baked, remove the quiche from the oven and let it cool for about 5-10 minutes before slicing. This allows the quiche to firm up slightly, making it easier to slice and serve.

FINAL STEP: SERVE AND ENJOY

1. Serve: Cut the quiche into wedges and serve warm. It pairs wonderfully with a fresh green salad, roasted vegetables, or a light soup.