Clean the brussels sprouts by slicing them in half and removing the tough outer layers.
In a bowl, zest the lemon and squeeze all the juice from it. Next, press the garlic cloves into the bowl. Add the olive oil, peppers, and salt into the bowl.
Place the brussels sprouts into the bowl and toss them until evenly coated in the mixture.
Bake the brussels sprouts at 420°F for 15 minutes or until they are golden brown.
Sprinkle the feta cheese on top of the brussels sprouts. Serve and enjoy!