The classic, British, bacon butty sandwich consists of a sweet and tangy sauce and crispy bacon between two slices of toasted bread. This version is elevated with golden, caramelized onions.
Heat a skillet over medium heat and add the canola oil. Add the onions and balsamic vinegar and cook, stirring often, until they begin to soften.
Reduce heat to medium-low and continue to cook, stirring often, until deeply golden (around 20 mins.).
For the Sandwich:
Place two paper towels on a plate. Arrange the slices of bacon on the paper towel, separately. Place 2 more pieces of paper towel on top of the bacon. (You may need to cook half of the bacon at a time, in order to fit the plate.)
Microwave on high until the bacon is slightly crispy, about 3 to 5 minutes. It will crisp up more as it cools.
Toast the bread slices.
Place the crispy bacon in between the bread slices with the caramelized onions. Add some brown sauce or BBQ sauce and serve.
Notes
If you want to cook your bacon in the oven instead, here’s how to do it: Preheat the oven to 400 degrees Fahrenheit, cover a baking pan with aluminum foil, put the bacon strips on top (do not overlap), and bake for about 20 minutes , or until crispy (keep an eye on them as time will vary).
If you need to store your sandwiches in the fridge for later, consume them within 2 days for best results.