Step 3
Put 3 cups of the cherry tomatoes and 1/4 cup of the onion in a small baking dish. Drizzle the top with 1 teaspoon of olive oil and sprinkle over 1/2 teaspoon of sea salt. Put the tomatoes in the oven, don't wait for it to heat up, and let them roast for 20 minutes. Quarter the remaining cherry tomatoes and set them aside.