Heat a large frying pan, add bacon - cook until just the edge of crispy, take bacon out and drain on paper towels
Leave about 1 ½ tablespoons of grease in the pan discarding the rest and add brussel sprouts - cook about 6-7 minutes
While it cooks, bring large pot of water to a boil and cook pasta according to package directions
Add the bacon back in the brussel sprouts pan - then add garlic until fragrant and mix
When the pasta is ready, drain (keeping about a cup of the water) and add pasta to bacon and brussels sprouts mixture with parmesan
Stir to combine well and if it’s too thick, add pasta water about a ¼ cup at a time until it’s where you like it
Season with salt & pepper
Add red pepper flakes - top with a little more parmesan and serve