Combine all ingredients in a bowl and mix until well combined. Marinate in the fridge overnight.
For the tacos:
In a large frying pan, heat oil on medium-High. Add onion and green pepper. Sauté until softened and then add chorizo. Turn heat to high and break chorizo with the back of a spoon. Cook until browned, and slightly crispy. Add Black Beans and sauté until warmed through. Set aside.
In a blender/food processor, combine avocado, water, lime juice and salt to taste. Puree until smooth.
Toss radishes and cilantro together in a bowl.
Assemble tacos by filling warm tortillas with chorizo mixture, drizzling with avocado cream, and topping with radishes/cilantro.