In a medium pot, stir together the beans, broth, jalapeno, and spices. Bring to a boil.
Reduce heat to a simmer. Stir in the nutritional yeast and dijon. Whisk in the flour and continue to whisk until the sauce begins to thicken. Remove from heat.Add bell pepper.
Blend until smooth in a blender.
Once you've assembled your nachos to your liking, drizzle with the cheese sauce and bake for about 10-15 minutes. Enjoy!