Though the title hints at a BLT variation, this recipe adapted from Donal Skehan's Good Mood Food is actually a riff on a bacon and avocado sandwich—a fantastic creation that really doesn't get enough love. The two work surprisingly well together, with the avocado accentuating the meatiness of the bacon, without making the the sandwich feel greasy.
Freshly sliced tomatoes would certainly work exceptionally well here, but considering most of us are all still mired in winter at the moment, sun-dried tomatoes are worthy substitute. Their flavor is richer and sweeter, which helps counteract the meatiness from the bacon.
Keeping the sandwich open-faced allows you to really appreciate the different components, but it also means that you might need two of these to really make a full meal. Of course, you could double up the ingredients and cap the sandwich with another slice of bread, but that's all up to you.