Ensure that all ingredients are at the same temperature and place them in a tall, narrow
container with a hand blender. Let everything stand for a while so that the ingredients
reach roughly the same temperature, so not to curdle the aioli. Mix on low with a hand
blender. Season, if necessary.
Before serving, chill the aioli. It will keep for a week in the fridge. If your blender does
not have speed settings, do not blend but only pulse at two-second intervals.
Sandwich Preparation:
Heat a portable grill and grill bacon. As soon as the colour changes (2-3 minutes),
turn the slices. Grill baguette halves next to the bacon on the grill. Just
before serving, when the bacon is crispy, place slices of cheese on it—melting
nicely.
Take baguette off the grill sooner: it should not be hot when served. Brush the lower
half with aioli, add tomato slices and lettuce if you are using it, and the
crispy bacon and cheese.