Brennan's Eggs Hussarde | Saveur

Ingredients

• 2 cups plus 3 tbsp. unsalted butter
• 1 clove garlic, finely chopped
• 1 scallion, finely chopped
• ¹⁄₄ yellow onion, finely chopped
• ¹⁄₄ cup finely chopped ham
• ¹⁄₄ cup minced mushrooms
• 1 tbsp. flour
• ³⁄₄ cup beef stock
• ¹⁄₄ cup dry red wine
• 2 tsp. Worcestershire sauce
• ¹⁄₂ tsp. dried thyme
• 1 bay leaf
• ¹⁄₄ cup finely chopped parsley
• Kosher salt and freshly ground black pepper, to taste
• 4 egg yolks, plus 8 poached eggs, for serving
• 1 ¹⁄₂ tsp. red wine vinegar
• ¹⁄₄ tsp. cayenne pepper, plus more for serving
• 1 medium tomato, cut into 4 slices
• ¹⁄₃ cup grated Parmesan cheese
• 8 slices Canadian bacon
• 8 Holland rusks