Step 1: Preheat and Prepare

• Preheat your oven to 350°F (175°C).
• Grease a 9×13-inch baking dish with nonstick cooking spray and set aside.

Step 2: Cook the Vegetables

1. Heat olive oil in a large skillet over medium-high heat.
2. Add sliced mushrooms and sauté for about 3 minutes until tender.
3. Add spinach and garlic, stirring until the spinach wilts, about 3 minutes.
4. Season with salt and black pepper to taste. Remove from heat.

Step 3: Assemble the Casserole

1. Spread the cooked vegetable mixture evenly across the prepared baking dish.
2. Sprinkle sliced green onions over the vegetables.
3. Crumble half of the goat cheese on top.

Step 4: Prepare the Egg Mixture

1. In a large mixing bowl, whisk together eggs and milk until well combined.
2. Season the mixture with salt and black pepper to taste.
3. Pour the egg mixture evenly over the vegetables and cheese in the dish.

Step 5: Add Final Touches

• Crumble the remaining goat cheese over the top of the eggs.

Step 6: Bake

1. Place the casserole in the preheated oven.
2. Bake for 30–40 minutes, or until the eggs are set and the edges are golden brown.

Step 7: Serve

1. Remove the casserole from the oven and let it cool for 5 minutes.
2. Garnish with freshly chopped chives, if desired.
3. Slice into portions and serve warm.