Roasted Red Capsicum Buns - Diabetes Friendly Roasted red capsicum buns are a tasty and nutritious option for those looking to enjoy a delightful snack without spiking their blood sugar levels. Capsicum, also known as bell pepper, is not only flavorful but also rich in vitamins and antioxidants. The sweetness of roasted red capsicum pairs beautifully with whole grain buns made from low glycemic index flours.