Baked Mac 'n' Cheese

• 1 1/2 dry
• 425 gr casserole
• 210 gr elbow (hot cooked)
• 9 gr margarine
• 5 ml prepared mustard
• 2 gr dry bread crumbs
• 1 gr pepper
• 1 package campbells condensed cheddar
• 1/2 packages milk