Gather all ingredients before starting recipe.
Heat 1 tsp oil in a large deep sided skillet over medium heat.
Peel and slice 1/2 medium Spanish onion, 1/2 red bell pepper and 1/2 green bell pepper and add to the pan and cook for 3-4 minutes or until the mixture is steaming and beginning to soften.
Add 1 can (14 oz) kidney beans and their juice.
Measure and add 1/2 cup brown sugar, 1 tbsp Worcestershire sauce, 2-3 tbsp ketchup and season with kosher salt and freshly ground pepper.
Stir to combine and cook for another 3-4 minutes, the vegetables should be crisp tender, and the sauce should coat the back of a spoon.