Ribeye Sandwich | Bush Cooking

Ingredients

• 2 tablespoons prepared horseradish
• 1/4 cup mayonnaise
• 1/4 cup sour cream
• 1/4 cup grated Parmigiano Reggiano cheese
• 2 pounds ribeye steaks
• 1 tablespoon steak rub
• 8 slices Artisan bread (or 4 ciabatta rolls)
• 1 tablespoon olive oil
• 1/2 red onion (sliced thin)
• 2 cups fresh arugula