Place the chopped red peppers and the tablespoon of olive oil in a frying pan and cook over medium low heat until very soft - about 20 minutes.
Once the pepper is cooked, place the cannellini beans, garlic clove, onion powder, salt, pepper, olive oil, and vinegar into the food processor. Add half of the cooked red peppers, and set the rest aside.
Process the dip ingredients until they are smooth. Add more olive oil if the dip seems too dry. Taste and add more salt and pepper if needed.
Spoon the dip into a bowl and top with the reserved red peppers. Serve with tortilla chips, crackers, or fresh veggies.