Add in tomatoes and their juices, olives and their brine, sugar, red pepper flakes, salt and pepper. Stir to combine, cover with lid and bring to a boil. Once boiling, reduce heat to low and simmer for 20 minutes
Add baby potatoes to a large pot with enough cold water to cover them and add a pinch of salt. Cover and bring to a boil, then reduce heat to low and cook for 15-20 minutes or until potatoes are soft when pierced with a fork. Drain and set aside.