Roast Beef Sandwich with French Onion Dip and Crispy Shallots | Emerils.com

Ingredients

• 2 tablespoons olive oil
• 2 tablespoons butter
• 1 small yellow onion, thinly sliced
• 3 large shallots, thinly sliced
• 3 green onions, thinly sliced, white and green parts reserved separately
• 1 clove garlic
• 1/2 cup mayonnaise, homemade or store-bought
• 1/2 cup crème fraîche
• 1 tablespoon freshly squeezed lemon juice
• 2 teaspoons sea salt
• 1 pound thinly sliced roast beef
• 8 slices sourdough sandwich bread, lightly toasted
• Crispy Shallots