Steps: ( references from http://blog.hubspot.com/marketing/how-to-embed-pinterest-boards-on-your-website-quick-tip)
1:Go to Pinterest's Widget Builder and select 'Board Widget.'
2) Paste the URL of the board you'd like to embed. Customize the size of the board as you wish under 'Advanced Options.' Then, click 'Build It!'
choose board/profile: like https://www.pinterest.com/Sereypheap/food/
modify the screen like 700x500 or any your favorite
Copy and paste this code into your page where you want your add-on to appear: