Heat skillet with 1 tablespoon of olive oil on medium-high heat
In a medium bowl, toss brussels sprouts in 1 tablespoon of olive oil
Once pan is hot, pour brussels sprouts onto pan and cook for about 4 minutes with cover on (lifting cover every minute or so to mix the sprouts around the pan so all sides cook)
In the same medium bowl, add garlic, dijon and nuts then pour brussels sprouts back in bowl and toss
Add 1 tablespoon of olive oil to pan and pour brussels sprouts back and cook until your liking (I did about 5 more minutes)