In a large skillet, cook the beef, onion and pepper over medium heat until meat is no longer pink; drain. Stir in the beans, tomato paste, water, ketchup, oregano and salt.
Separate crescent dough into four rectangles; seal perforations. Spoon a fourth of the meat mixture onto half of each rectangle; sprinkle with cheese. Fold dough over filling; pinch edges to seal. Cut slits in tops.
Place on an ungreased baking sheet. Bake at 375° for 13-15 minutes or until golden brown.