Found throughout the Balkans, ajvar is a smokey, slightly sweet and sometimes spicy pepper and eggplant spread that is simple to make - even if you only have access to an oven!
Preheat the broiler/grill to as high as your oven will go. Keep the rack in the middle. Line a baking tray with foil and grease lightly with oil. Arrange the peppers, chili and eggplant on the tray and move to the oven. Broil until charred and blackened - about 20 minutes.
Allow the vegetables to cool for a few minutes before roughly chopping them and adding to the bowl of a food processor (see note 3). Pulse several times until the peppers and eggplant are very smooth and broken down.
Add 1 tbsp of olive oil along with the chili flakes (if using) to a large saucepan. Set over medium heat and, once shimmering, add the garlic. Cook until fragrant - about 30 seconds.
Scrape the pureed pepper mixture into the pan and stir to combine. Add the salt and bring up to a simmer. Allow to simmer, stirring frequently, for 5-10 minutes. Taste to adjust for seasoning and stir in the vinegar and sugar, if using. Remove from the heat and allow to cool completely before serving.
Notes
Omit the chilis and the chili flakes if you do not want a spicy (ljuti) ajvar
Taste the ajvar before adding the sugar. Some peppers are sweeter than others and it's not always necessary to add additional sugar to get the desired finished flavour.
If you do not have a food processor, wait until the vegetables are cool to the touch before very finely chopping them with a knife. The finished ajvar will not be as smooth, but it will still be delicious.