Prepare the tomatoes. Place the tomatoes cut side up on a baking sheet. In a dry, clean bowl, add salt, thyme, ground pepper, oregano, and garlic powder. Stir. Sprinkle the tomatoes on the baking sheet with this mixture. Place the baking sheet in the oven. Leave the door slightly ajar. Dry for 6 hours.
Place the tomatoes in a jar. Pour vegetable oil into a suitable container and place in the microwave for 1 minute to make it hot. Place the garlic cloves in the jar. Then tightly place the tomatoes. Roll up or screw the lid tightly. Store this preparation at room temperature, and after opening - in the refrigerator.