Sweet and Sour Butter Beans

Name: Sweet and Sour Butter Beans
Ingredients: 2 tablespoons olive oil; 1 medium yellow onion; chopped small; 1 red bell pepper; chopped small; 1 clove of garlic; minced; 1 can of plain tomato sauce; 8 oz. (I usually get the salt-free kind and add my own salt); 1 tablespoon brown sugar; 1 tablespoon apple cider vinegar; 1 tablespoon Dijon mustard; 2 tablespoons soy sauce; 1/2 teaspoon salt; 1 can of pineapple chunks; 20 oz. In pineapple juice; 1/3 cup pineapple juice reserved from pineapple chunks; 2 one lb. cans of butter beans; rinsed and drained; 1 1/2 teaspoons corn starch; 2 tablespoons water; Rice for serving