Celery Smashers with Cream Gravy

INGREDIENTS

• 5 large russet potatoes, peeled and cubed
• 3 tablespoons butter, divided
• 1/3 cup diced celery hearts
• 1/3 cup finely chopped onion
• 1/4 cup heavy cream
• 1/2 teaspoon celery salt
• freshly ground black pepper to taste
• 2 teaspoons butter
• 1 1/2 tablespoons all-purpose flour
• 1 cup chicken broth
• 1/3 cup heavy cream
• 1/2 teaspoon onion powder