Cook the broccoli and onion

• Bring water to a boil in a pot.
• Add the frozen broccoli and diced onion and cook until the broccoli is very soft.
• Melt the butter separately.

Drain the broccoli

• Pour the cooked broccoli and onion into a strainer.
• Press and mash it down well to remove all the excess water.

Mix in the cheese

• Transfer the strained broccoli to a large bowl.
• Add the shredded sharp cheddar and stir to melt the cheese.

Add the remaining ingredients

• Add the milk, mayonnaise and egg.
• Season with salt and pepper.
• Mix everything together really well.

Top with crackers and butter

• Crush the Ritz crackers and spread them evenly over the top.
• Pour the melted butter over the crackers.

Bake

• Bake at 175 °C until the top is golden brown.