Start with rotating your hips to one side and blocking your opponents hips with both hands. This allows you to move your own hips away, creating a gap to get your bottom knee out.
From here there are options to sweep.
Pay attention to the details explained by Sensei Douglas Santos when it comes to where you should place your feet and your grips.
If you are in Auckland, New Zealand, and want to train at DS Team, visit https://www.dsteamjiujitsu.co.nz for more information.