Heirloom Tomato Gratin Recipe

Name: Heirloom Tomato Gratin
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 1 garlic clove, cut in half; 3 tablespoons extra virgin olive oil; 1 large vidalia onion, chopped; 1/2 teaspoon grated orange zest; 3 tablespoons orange juice; 2 teaspoons honey; 1 tablespoon fresh thyme, chopped; 4 lbs mixed heirloom tomatoes, thickly sliced; 2 cups fresh breadcrumbs; 1/4 cup pecorino romano cheese, grated

Servings: persons

1
Heat oven to 425 degrees.
2
You'll need a shallow 2- to 2 1/2-quart baking or gratin dish.
3
Vigorously rub inside of dish with garlic, discard garlic.
4
Brush dish with 1 T oil to coat.
5
Heat 1 1/2 T oil in large skillet over medium low heat.
6
Add onion and cook 15 minutes, stirring often, just until translucent and tender, but not browned.
7
Remove from heat, stir in orange zest and juice, honey and 1 1/2 t thyme.
8
Scatter half over bottom of prepared dish; top with half of the tomatoes and season with half the salt and pepper.
9
Top with remaining onion mixture, tomatoes, salt and pepper, overlapping tomato slices to fit.
10
Mix bread crumbs, cheese and remaining 1/2 T oil and 1 1/2 t thyme until crumbs are evenly moistened.
11
Sprinkle over tomatoes.
12
Bake 20-24 minutes until crumbs are golden and juices bubble.
13
Serve hot or warm.

451

kcal

Calories

Fat

Carbs

Protein

Fat Carbs Protein

* Per serving · 4 servings · Values may vary.

Tips for the best results

Read through all the steps once before you start and measure out your ingredients first — it makes everything go more smoothly.
Taste as you go and adjust the seasoning before serving.
Avoid overcrowding the pan — cook in batches if needed for the best texture.
Let the dish rest for a few minutes before serving so the flavors settle.
Store leftovers in an airtight container in the fridge and enjoy within a few days.

Variations & substitutions

Swap the honey for maple syrup or agave for a slightly different but equally rich sweetness.

No specific allergen information. Please check the ingredient list for possible allergens.

My Personal Notes

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How did you like this recipe?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

You need 10 ingredients. The key ingredients include: 1 garlic clove, cut in half, 3 tablespoons extra virgin olive oil, 1 large vidalia onion, chopped, 1/2 teaspoon grated orange zest, and more.

Yes, Heirloom Tomato Gratin falls under the General category and is a great choice for this type of meal.

Store leftovers in an airtight container in the refrigerator for up to 3–4 days. Reheat gently before serving.

That's it — enjoy your meal!

Heirloom Tomato Gratin

Tips for the best results

Variations & substitutions

My Personal Notes

How did you like this recipe?

Frequently Asked Questions