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Gruyère French Onion Beef and Wild Rice Gratin

Gruyère French Onion Beef and Wild Rice Gratin - featured image
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This comforting gratin combines the savory flavors of French onion soup with tender beef, nutty wild rice, and a golden Gruyère cheese crust. It’s a hearty, crowd-pleasing casserole perfect for cozy nights, potlucks, or family dinners.

Ingredients

Scale
  • 3 large yellow onions, thinly sliced (about 2 lbs)
  • 2 tablespoons unsalted butter
  • 1 tablespoon olive oil
  • 1/2 teaspoon salt
  • 1 teaspoon fresh thyme leaves (or 1/2 teaspoon dried thyme)
  • 2 cloves garlic, minced
  • 1 tablespoon balsamic vinegar (optional)
  • 1 lb beef sirloin or chuck, cut into bite-size cubes
  • 1 tablespoon olive oil
  • 1/2 teaspoon black pepper
  • 1 cup uncooked wild rice blend
  • 2 1/2 cups beef broth (low-sodium preferred)
  • 1 tablespoon Worcestershire sauce (optional)
  • 1 1/2 cups shredded Gruyère cheese
  • 1/4 cup grated Parmesan cheese
  • 1/2 cup panko or fresh breadcrumbs
  • 1 tablespoon unsalted butter, melted
  • Chopped fresh parsley, for garnish (optional)

Instructions

  1. Preheat oven to 375°F (190°C). Grease a 3-quart casserole or baking dish. Rinse wild rice under cold water.
  2. Bring a medium pot of salted water to a boil. Add wild rice, reduce to a simmer, and cook uncovered for 35-40 minutes, or until grains split and are tender but chewy. Drain and set aside.
  3. In a large skillet or Dutch oven, melt 2 tablespoons butter and 1 tablespoon olive oil over medium heat. Add sliced onions and 1/2 teaspoon salt. Cook, stirring frequently, for 25-30 minutes until onions are deep golden and jammy. If they stick, add a splash of water. Stir in thyme and garlic for the last 2 minutes. Add balsamic vinegar, if using, and cook another minute. Transfer onions to a bowl.
  4. Return the pan to high heat, add 1 tablespoon olive oil. Add beef cubes, season with black pepper, and sear for 3-4 minutes until browned on all sides. Work in batches if needed.
  5. Pour in beef broth and Worcestershire sauce. Scrape up any brown bits from the pan. Bring to a simmer, then remove from heat.
  6. In the prepared dish, layer drained wild rice, then beef and broth mixture, and top evenly with caramelized onions. Gently stir to distribute, but do not overmix.
  7. In a bowl, combine Gruyère, Parmesan, panko, and melted butter. Mix well. Sprinkle evenly over the gratin.
  8. Cover loosely with foil and bake for 20 minutes. Remove foil and bake another 15-20 minutes, or until topping is golden and bubbling around the edges.
  9. Let the gratin rest for 10 minutes before serving. Garnish with chopped parsley if desired.

Notes

Caramelizing the onions slowly is key for deep flavor—don’t rush this step. For gluten-free, use GF panko or omit breadcrumbs. You can prep the onions and rice a day ahead. Leftovers reheat well and can be frozen for up to 2 months. For a vegetarian version, substitute mushrooms and vegetable broth for beef and beef broth.

Nutrition

Keywords: French onion, gratin, beef casserole, wild rice, Gruyère, comfort food, casserole, winter recipes, oven baked, crowd-pleaser, gluten-free option

Find it online: https://atomicbite.com/gruy-e-re-french-onion-beef-and-wild-rice-gratin-easy-comfort-food-recipe/