Green Bean And Portobello Mushroom Casserole Recipe

Cooking Directions

• STEP 1.Preheat the oven to 375°F (190°C) and grease a casserole dish.
• STEP 2.In a large pot of boiling salted water, cook the green beans until crisp-tender, about 5 minutes. Drain and set aside.
• STEP 3.In a large skillet, heat the olive oil over medium heat. Add the onions and garlic and cook until softened, about 5 minutes.
• STEP 4.Add the sliced portobello mushrooms and cook until they release their moisture and start to brown, about 8 minutes.
• STEP 5.In a separate saucepan, melt the butter over medium heat. Whisk in the flour and cook for 1 minute.
• STEP 6.Gradually whisk in the milk and cook until the sauce thickens, about 5 minutes. Stir in the grated Parmesan cheese and season with salt and pepper.
• STEP 7.In the greased casserole dish, combine the cooked green beans, sautéed mushrooms, and the creamy sauce. Mix well to coat everything evenly.
• STEP 8.Sprinkle the shredded mozzarella cheese on top of the casserole.
• STEP 9.Bake in the preheated oven for 25-30 minutes, or until the cheese is melted and bubbly.
• STEP 10.Remove from the oven and let it cool for a few minutes before serving.
• STEP 11.Garnish with fresh parsley, if desired, and serve hot.

Cooking Tips

• You can blanch the green beans ahead of time and store them in the refrigerator until ready to use.
• Feel free to add other vegetables like carrots or bell peppers to the casserole for added flavor and color.
• For a vegetarian version, you can substitute vegetable broth for the chicken broth in the creamy sauce.
• If you prefer a crispy topping, you can sprinkle breadcrumbs or crushed crackers on top of the casserole before baking.
• Leftovers can be stored in an airtight container in the refrigerator for up to 3 days.

Storage and Serving

• This casserole is best served hot and fresh from the oven.
• If you have leftovers, you can reheat them in the oven at 350°F (175°C) until warmed through.
• Serve as a side dish with roasted chicken, grilled steak, or as a main dish with a side of salad.
• Garnish with fresh herbs like parsley or thyme for an extra burst of flavor.