If you're on the hunt for a hearty and gluten-free dish, look no further than this Savory Spinach & Mushroom Casserole. It's packed with flavor, easy to whip up, and perfect for any occasion, whether it's a family dinner or a potluck party.
The base of this dish starts with olive oil, which we use to sauté our yellow onion and garlic. The combination adds a sweet and savory foundation to the casserole. Button mushrooms provide a hearty, earthy flavor that pairs well with the dried thyme. Fresh spinach leaves not only bring a pop of color but are also packed with nutrients. Gluten-free bread crumbs help to bind everything together while adding texture. Shredded mozzarella cheese melts beautifully, adding a creamy layer of flavor. Eggs are crucial for holding the casserole together, while almond milk keeps it light and dairy-free. Finally, a sprinkle of Parmesan cheese on top adds a salty, nutty finish.
This casserole pairs wonderfully with a crisp side salad tossed in a light vinaigrette. For a heartier meal, serve it alongside grilled chicken or roasted salmon. A glass of chilled white wine, like a Sauvignon Blanc, complements the flavors beautifully.
First, let's get the oven preheating at 350°F (175°C) and prepare a 9x13 inch baking dish by greasing it lightly. This ensures our casserole won't stick and will come out in perfect slices.
In a large skillet, heat up the olive oil over medium heat. Once it's shimmering, toss in your chopped onion and minced garlic. Sauté them together until the onion turns translucent; this will take about 5 minutes and your kitchen will start to smell amazing.
Next, add the sliced mushrooms along with salt, pepper, and thyme. Cook these until the mushrooms are tender, stirring occasionally. This should take another 5 minutes or so. Once the mushrooms are ready, stir in the fresh spinach. It will wilt quickly, so just give it a minute or two.
In a large mixing bowl, combine the gluten-free bread crumbs, mozzarella cheese, eggs, and almond milk. Mix them until well combined. Now, add your sautéed vegetables to this mixture, and stir until everything is evenly distributed.
Pour the mixture into your prepared baking dish, spreading it out evenly. Sprinkle the top with grated Parmesan cheese for that extra bit of flavor.
Bake in your preheated oven for 35-40 minutes, or until the top is a lovely golden brown and the casserole is set. Let it cool for a few minutes before serving so it can firm up a bit.
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