Savory French Onion Green Bean Bake

Experience the comforting flavors of our Savory French Onion Green Bean Bake, a vegetarian masterpiece that combines the sweetness of caramelized onions with the creamy richness of Gruyère cheese. This American cuisine dish is perfect for holiday feasts or cozy family dinners. Note that it contains dairy and gluten, making it a delicious option for those who enjoy these ingredients.

With its savory flavor profile, this casserole is versatile enough to complement any meal, whether served as a side or a main dish. Packed with nutrients, it offers a wholesome addition to your diet.

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Recipe Collection: Dinner

Serving Size: 10

Cooking Time: 90 minutes

Overview

This French Onion Green Bean Casserole elevates the classic dish with the rich flavors of caramelized onions and Gruyère cheese, reminiscent of French onion soup. Perfect for holiday gatherings or as a comforting side dish.

Diet Type

Vegetarian

Allergies

Dairy, Gluten

Cuisine

American

Ingredients

• 2 Tablespoons (tbsp) butter
• 2 Large yellow onions, sliced
• 1 Pinch salt, to taste
• 1 Pinch black pepper, to taste
• 1 Tablespoon (tbsp) sherry vinegar
• 2 Tablespoons (tbsp) butter
• 2.5 Tablespoons (tbsp) all-purpose flour
• 2.5 Cups milk
• 1 Pinch ground nutmeg
• 1 Pinch cayenne pepper, to taste
• 0.25 Teaspoons (tsp) thyme, ground
• 2 Tablespoons (tbsp) butter, melted
• 0.67 Cups panko bread crumbs
• 2 Pounds (lb) green beans, trimmed
• 4 Ounces (oz) Gruyere cheese, shredded
• 0.33 Cups Parmesan cheese, grated

Steps

1. Preheat the oven to 375°F (190°C). Grease a 9x13-inch casserole dish.
2. Heat 2 tablespoons of butter in a large skillet over medium heat. Add onions and cook, stirring, until very soft and golden brown, about 15 minutes. Stir in sherry vinegar. Transfer to a small bowl and reserve.
3. In the same skillet, melt 2 more tablespoons of butter. Whisk in flour and cook, stirring constantly, over medium heat until the flour smells like baked pie crust, about 3 minutes. Slowly whisk in milk, about 1/2 cup at a time, then add nutmeg, cayenne pepper, and thyme. Bring to a simmer and cook until thickened, whisking constantly, about 3 more minutes. Transfer to a bowl and reserve.
4. Melt the remaining 2 tablespoons of butter in a clean skillet; stir in panko until all crumbs are coated; reserve.
5. Bring a large saucepan of salted water to a boil over medium heat, and boil green beans until bright green and crisp but not raw tasting, 3 to 4 minutes. Drain very well.
6. Spoon half of the caramelized onions into the prepared casserole dish; top with green beans. Season with salt and black pepper. Spread reserved white sauce over the green beans; sprinkle with half of the Gruyere cheese. Top with the rest of the onions, and use the back of a spoon to push onions down into sauce and cheese. Top with the buttered panko crumbs, the remaining Gruyere, and Parmesan cheese.
7. Bake in the preheated oven until hot throughout and lightly browned, about 30 minutes. Let sit for 10 minutes before serving.

Enjoy this savory and comforting casserole with your loved ones!