Preheat your oven to 350°F (175°C).
In a large bowl, combine the cream of chicken soup, mayonnaise, lemon juice, and curry powder.
Add the shredded chicken and steamed broccoli to the mixture, stirring until well combined.
Season with salt and pepper to taste.
Transfer the chicken and broccoli mixture into a greased baking dish.
Sprinkle shredded cheddar cheese evenly over the top.
In a separate bowl, mix breadcrumbs with melted butter until well coated.
Spread the breadcrumb mixture over the cheese layer.
Bake in the preheated oven for 25-30 minutes until golden brown and bubbly.
Allow to cool slightly before serving.