Updated: Sep 25, 2020
Add one tablespoon olive oil to bottom of frying pan. Add peppers and onions. When they develop some color and are getting soft add chopped garlic. Add black beans and garbanzo beans and then fresh spinach. Cover to let spinach cook. Season with salt and enjoy.
I can't give amounts, I can only give ingredients. Most Italians don't cook with measurements, they cook with heart. My mom taught me to add ingredients until "it looks good". So, judge for yourself.