lay out bacon slices in baking sheets and cook 15-20 minutes at 400F til crispy, then finely chop into bacon bits
melt butter in a sauce pan on medium, once fully melted whisk in flour to create a roux.
Add the beer, mustard and worchestershire. Turn heat to high and bring to a boil.
Remove pan from heat. Add cheese a handful at a time, while constantly whisking. Only add the next handful of cheese once the sauce has returned to being smooth.
Adjust sauce flavour with pepper and Worchestershire as needed.
Arrange the baguette slices (crostini) on a baking sheet, drizzle with olive oil and broil til golden brown- a minute or less (pay attention to them!)
Build your rarebits! Community style: Lay out some crostini , pile on tomatoes, cover with cheese sauce, add bacon bits and green onions. Single style: pile some tomatoes on each crostini, top with about 1 tbsp or more of cheese, bacon bits and onions.
Notes
These cheese sauce is also great for dipping pretzels!
