Feet together back squats
This is a great movement if you have decent flexibility in your Achilles. If not, put a 5lb plate under each heel this Will allow greater ankle mobility and you’ll be able to preform the movement more effectively.
Doing this squat with a 3 second negative and a bit of an explosive concentric portion, really puts a lot of tension on the outside quad portion. It’s also very easy to consciously contract your glutes at the bottom of the range of motion as well.