Since I posted this I did go back and find the original recipe: Spaghetti with Sweet Pepper--Spaghetti con Sugo di Peperoni
After the peppers are tender add a can of tomato paste and cook until it darkens, which takes about 20 minutes stirring occasionally.Then add in a cup of red wine. Use a dry red, it seems to work better with the sweetness of the peppers. Bring to a boil then reduce to a simmer. I let this cook for 30 minutes or so, adding a little wine and water, to keep the sauce the consistency of ragu.
You can't have spaghetti without garlic cheese bread. Lately we have been using Arnold Select Sandwich Thins, which are lower in calories and get very crispy in the oven. So here it is with a glass of the same wine used in cooking.
It takes a while to cook a great sauce, but it was worth it in the end. Don't be alarmed that this is a vegetarian dinner, it doesn't happen often around here. Over the years I have added a variety of meat, but it is never as good as the original. But for a great sausage and peppers dish, add links of Italian sausage.