Sauté onion in olive oil until translucent. Add garlic and cook another minute or so. Stir in chili powder and cook 1 more minute. Add tomatoes and broth. Bring to a boil and simmer for 5-10 minutes. Slowly add adobo sauce to taste. (Make sure you test and avoid adding the seeds as this sauce can be very spicy). If you like it very spicy you can chop a chili and add it as well. Add corn, black beans, chicken, salt, and pepper. Simmer for 10 minutes. This part freezes well. Serve with toppings below.1/2 cups cilantro choppedAvocados choppedMonterey Jack cheese shreddedCorn tortillas ( fry in 1/2" strips and sprinkle with salt)Sour cream Lime wedges