Sweet and Sour Chickpeas - Vegan Heaven

Ingredients

• 1/3 cup rice vinegar
• 4 tablespoons tomato paste
• 2 tablespoons brown sugar
• 2 teaspoons soy sauce
• 2 teaspoons garlic powder
• 1/2 teaspoon ground ginger
• 3/4 cup pineapple juice
• 1 tablespoon cornstarch
• 1 red bell pepper, cut into medium-sized pieces
• 1 can cooked chickpeas ((2 cups))
• 1 14 oz can unsweetened pineapple
• 2 green onions, chopped