Place cauliflower, broccoli and crushed garlic in an ovenproof baking dish and sprinkle with Chicken & Chips Salt.
To make the cheese sauce;
Heat butter in a saucepan over medium heat for 2 minutes or until melted and foaming.
Add flour, cook, stirring, for 1 minute or until bubbling.
Once smooth, return pan to heat, and cook, stirring for 5 minutes or until sauce boils and thickens.
Remove pan from heat and add milk slowly, 1/4 cup at a time, stirring vigorously to prevent lumps forming.