Roast Beef & Cheddar Sandwich

Roast Beef & Cheddar Sandwich
ONION ROLL (makes 6 rolls)
▪100g or 1/2c warm water (86F/30C)
▪6g or 1 1/2t instant yeast
▪35g or 3T sugar
▪1 egg yolk
▪35g or 2 1/2T melted (but not hot) unsalted butter
▪75g or about ½ of a medium mashed (riced) potato
▪7g or 1 1/2t dough conditioner
▪315g or 2 1/2c all purpose flour
▪6g or 1t salt
▪Egg wash

ROLL TOPPINGS
▪1 medium sweet/vidalia onion
▪Olive oil
▪Salt
▪Sugar
▪50g or 1/4c of water
▪Poppy seeds
▪Flaky salt

ROAST BEEF
▪8lb/3.5kb top round beef roast
▪Olive oil
▪salt
▪pepper

THE TANGY SAUCE
▪100g or 1/2c water
▪125g or 1/2c ketchup
▪15g or 1T steak sauce
▪10g or 1T brown sugar
▪10g or 1T hot sauce
▪15g or 1T white vinegar
▪2g or 1/2t onion powder
▪2g or 1/2t garlic powder
▪2g or 3/4t black pepper
▪3g or 1/2t salt

CHEESE SAUCE
▪225g or 3c medium cheddar cheese, shredded
▪8g or 2 1/2t corn starch
▪250g or 1c evaporated milk