Roast your vegetables in the oven. Once cooked and soft, place the cooked vegetables in a bowl.
Season very generously with salt and pepper and ¼ cup vinegar (or enough to generously coat the veg). Let stand for 15 mins before adding ½ cup olive oil. Add more of each if needed, sticking with the correct proportions (2 parts oil to 1 part vinegar).
Add your chosen herbs and flavour enhancers.
If planning to eat within the week, place all ingredients into clean jars, removing air bubbles by stirring with a spoon. Top with more oil and vinegar so the veggies are completely submerged. Refrigerate.
If wanting to preserve for longer, simply remove any fresh ingredients (i.e. herbs and raw garlic). Note: Keep jars refrigerated at all times.