Garlic Chicken Pasta

1/2 onion , sliced very thin 4 garlic cloves , minced 2 roma tomatoes , peeled and chopped 2 tablespoons olive oil 1 chicken breast , cut into bite-size[...]

2 cups cooked chicken, cut into bite sized pieces 1 garlic cloves or 1/2 teaspoon garlic powder 1 -2 tablespoon olive oil 2 1/2 cups pasta (shells, spiral,[...]