Roasting really intensifies the flavour of tomatoes, so one of the delights of this roasted tomato salad is actually being able to taste the subtle differences between different varieties of tomato.
It's actually quite easy to skin whole hazelnuts. Just roast in a moderate oven for 10-15 minutes, then wrap in a tea-towel for one minute for the steam to loosen the skins, rub inside the towel to remove skins and then cool.
You can add a small fresh chilli to each jar if you like your oven-dried tomatoes spicy. Egg tomatoes are perfect for this recipe as they don't have many seeds, but you can use any variety just make sure you choose ripe unblemished tomatoes.