Start to fry onion (2 mins) in smooth olive oil and add green pepper and chili flakes. When pepper soft and onion light brown add corn and stir. Meanwhile, start to boil pasta al dente . Then add chopped tomatoes and cook a few minutes until sauce starts to thicken a little. Add frito or puree and stir. Add sugar and oregano. Cook a few mins more on low to med heat and then add salt and pepper.
Drain and add tuna, stir, turn off heat and add cream.
Drain pasta, mix all together and lay in baking dish. Cover with breadcrumbs and grated cheese so there is a nice even topping. Bake in med hot oven for 10 to 15 mins until topping is crusty and serve.
Perfect with a little Garlic chili sauce and crusty baguette.