Spinach Salad with Warm Bacon Dressing

INGREDIENTS

• 2 large eggs
• 1/2 teaspoon Dijon mustard
• Kosher salt and freshly ground black pepper
• 8 pieces thick-sliced bacon, chopped
• 8 ounces young spinach
• 4 large white mushrooms, sliced
• 3 tablespoons red wine vinegar
• 1 teaspoon sugar
• 3 ounces red onion (1 small), very thinly sliced