Preheat the oven to 375°F and lightly coat a baking sheet with cooking spray.
After draining and rinsing the black beans, pat them with a paper towel to remove the excess water. Mash them in a medium bowl with a fork until they are thick and pasty.
Finely chop the bell pepper, onion, and garlic in a food processor. Dry the vegetables using a paper towel then add them to the mashed beans.
In a small bowl, stir together the egg, chili powder, cumin, and Thai chili sauce. Add the egg mixture to the mashed beans.
Mix the bread crumbs into the mashed beans until the mixture is sticky and holds together. Divide the mixture into four patties.
Place the patties on the baking sheet and bake for 12 minutes. Flip them and bake for another 10 minutes.