French Minced Beef Hamburgers with Stuffed Mushrooms (Original video)

Ingredients:

• 3 ounces (85 grams) chopped onions
• 1 ounce of butter
• 1.5 pounds (680 grams) lean minced beef
• 1.5 teaspoons salt
• 1/8 teaspoon pepper
• Fresh thyme
• 1 egg
• 1 ounce softened butter or pork fat
• For stuffed mushrooms:
• 6 large mushroom caps
• 1/2 ounce (16 grams) Parmesan cheese
• 1/2 ounce Gruyere cheese
• 1.5 tablespoons plain white bread crumbs
• 2 tablespoons chopped parsley
• 3 tablespoons chopped onion
• 3 tablespoons chopped spring onion or shallot
• Salt and pepper to taste
• Dried tarragon
• Heavy cream
• Melted butter

Instructions:

1. Sauté finely chopped onions in butter until tender but not browned.
2. Mix minced beef with salt, pepper, thyme, egg, and softened butter/pork fat. Form into patties and refrigerate.
3. Prepare stuffed mushrooms: Remove stems from mushroom caps and chop them. Sauté chopped stems, onions, spring onion/shallot, and seasonings. Add cheese, bread crumbs, parsley, and heavy cream. Stuff mushroom caps with the mixture, top with cheese, and bake at 375°F (190°C) for 15-20 minutes.
4. Cook beef patties in a mixture of butter and oil until desired doneness.
5. Prepare sauce by deglazing the pan with beef stock, reducing, and adding butter.
6. Serve hamburgers with stuffed mushrooms and sauce drizzled on top. Enjoy!