Italian Chicken Sandwiches

4 boneless, skinless chicken breast halves
2 Tbls. vegetable oil
1/2 C. chopped onion
2/3 C. water
1/4 C. tomato paste
3/4 tsp. dried basil
1/2 tsp. each dried oregano and garlic salt
1 C. chopped green bell pepper
1 loaf Italian bread
1 C. shredded mozzarella cheese

Chop chicken to yield about 3 cups. Heat vegetabel oil in a large skillet over med. heat. Cook chicken and onion in hot oil, stirring frequently, until chicken is browned, about 5 min. Combine water, tomato paste, basil, oregano and garlic salt and mix well. Stir into chicken mixture in the skillet. Add bell pepper and mix well. Bring mixture to a boil. Reduce heat to low. Cook, stirring occasionally, until the mixture is thickend, about 2 min. Preheat broiler. Cut bread diagonally into 2 1/2 in. slices. Cut the slices in half horizontally. Arrange bottom halves on a baking sheet. Spoon equal portions of the chicken mixture on each slice. Sprinkle mozzarella on top. Broil just until mozzarella is melted. Top with the remaining bread slices. Serve immediately.