To peel the tomatoes: Bring a pot of water to a boil. Make a small cross cut ( 1/4 in x 1/4 in) at the bottom of each tomato. Drop tomatoes in boiling water for 1 minute, until skins start to wrinkle.
Place tomatoes in a bowl with cold water for a few minutes, until cool enough to handle.
Peel tomatoes, cut into small cubes.
In a saucepan, combine tomatoes, olive oil, garlic, salt, sugar, basil and oregano. Bring to a simmer, then reduce heat to medium and cook for 20-25 minutes, until thick, stirring frequently. Taste sauce and add more seasoning, if needed.
Season peppers with salt. Serve topped with the tomato sauce. Garnish with parsley.