Add chicken breasts (cut into pieces) with 1/2 tablespoon of the chili powder and stirfry until cooked through.
Add bell pepper and cook until soft.
Meanwhile, in another skillet add tomatoes and lentils with the 1 1/2 remaining tablespoons of the chili powder, 1/2 teaspoon paprika, dash of Worchestershire sauce, and salt and pepper to taste, over low heat.
Once chicken is cooked add it to the bean/tomato mixture and cook for a further 5 minutes.
Add more salt and pepper or spices according to preference.