Countdown Casserole

• 600 gr hash brown potatoes (frozen)
• 450 gr cubed roast beef (cooked)
• 270 gr vegetable combination see note (frozen)
• 180 ml milk
• 120 gr pasteurized process cheese spread
• 55 gr cheddar cheese (shredded)
• 40 gr frenchs french onions (fried)
• 1 gr seasoned salt
• 1 gr black pepper (freshly ground)