Blend together the Chili paste ingredients using a blender until smooth.
In a large pot over medium heat, cook the ground beef and the onions until onions become transparent.
Add the chili paste and cook for 2 minutes, stirring to keep it form sticking to the bottom.
Add the tomatoes and cook for another 5 minutes.
Add the beans and stock. Bring to a boil, then reduce to a simmer over low heat.
Stir in the chocolate chips, and salt to taste, then let simmer for 30-45 minutes uncovered, stirring occasionally. If it becomes too thick, add more stock.