Preheat oven to 200°F (94°C) and line a baking sheet with parchment paper. Set aside.
Cut the tomatoes into quarters, remove the core and discard. Scoop out the seeds and as much tomato pulp as possible.
Transfer the tomato quarters to a large mixing bowl. Sprinkle with the salt, mix, and let it sit for 5-10 minutes. Tomatoes will release some of their juice. Then, drain them.
Add the oil, oregano, and thyme and stir to coat. Place the tomato quarters cut-side up on the prepared baking sheet, ensuring the tomatoes don't touch each other.
Bake for about 4 hours, or until the tomatoes have reduced in size. Let cool completely.
To store: Place the dried tomatoes in a glass container and cover with canola or sunflower oil (olive oil would firm up in the refrigerator).
Dried tomatoes stored in oil will keep for up to 6 weeks in the refrigerator.
Notes
I don't recommend adding fresh herbs or garlic cloves to your dried tomato jar, as it will reduce the shelf life.