Preheat the oven to 400F. Spread the tomatoes and garlic in a single layer on a rimmed baking sheet; drizzle with oil, salt and pepper, roll around to coat and roast for 20-30 minutes, or until the tomatoes start to shrivel and turn golden.
Scrape into a pie plate or other shallow baking dish that has been sprayed with nonstick spray. Turn the oven down to 350F. Crumble over the goat cheese and sprinkle with chives.
In a medium bowl, whisk together the eggs, cream and flour; pour over the tomatoes and cheese. Bake for 20-25 minutes, until puffed and pale golden.
Serve immediately, wait until it cools to room temperature, or chill and serve cold.