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Green Tomato Bacon Gratin (Cheesy Southern Comfort Food Casserole)

If you have extra green tomatoes from the garden and want something cozy, cheesy, and a little different from fried green tomatoes, this Green Tomato Bacon Gratin is the perfect comfort food recipe. Tart green tomatoes are layered with crispy bacon, garlic, cream, Parmesan, and buttery breadcrumbs, then baked until golden and bubbly.

This easy green tomato casserole is a delicious way to use end-of-season tomatoes before they ripen. The green tomatoes soften as they bake while still keeping a slight tang that balances the richness of the cream, cheese, and bacon.

Serve it as a Southern-style side dish with chicken, pork chops, steak, or Sunday dinner, or enjoy it as a cozy vegetarian-style main dish by leaving out the bacon.

Quick Summary: Tart green tomatoes are layered with bacon, cream, Parmesan cheese, garlic, and buttery breadcrumbs, then baked into a golden Southern-style comfort food casserole.

Why You’ll Love This Green Tomato Bacon Gratin

• A unique way to use green tomatoes.
• Cheesy, creamy, and full of comfort-food flavor.
• Perfect for late summer and fall garden harvests.
• Great alternative to fried green tomatoes.
• Pairs well with chicken, pork, beef, and holiday meals.
• Easy Southern-style casserole.
• Can be made with or without bacon.

Green Tomato Bacon Gratin Recipe Card

Prep Time: 15 minutes
Cook Time: 35 minutes
Total Time: 50 minutes
Servings: 6 servings
Course: Side Dish, Casserole
Cuisine: Southern, American
Keyword: green tomato casserole, green tomato gratin, green tomato recipe, Southern comfort food

Ingredients You’ll Need

• 4 cups sliced green tomatoes
• 6 slices bacon, cooked and crumbled
• 1 small onion, thinly sliced
• 2 garlic cloves, minced
• 1 cup heavy cream
• 1 cup shredded sharp cheddar cheese
• ½ cup grated Parmesan cheese
• ¾ cup breadcrumbs or panko breadcrumbs
• 2 tablespoons melted butter
• 1 teaspoon Italian seasoning
• ½ teaspoon salt
• ¼ teaspoon black pepper
• Optional: ¼ teaspoon red pepper flakes
• Optional garnish: fresh parsley or basil

Ingredient Notes & Substitutions

• Green Tomatoes: Use firm, unripe tomatoes. They should be tart and sturdy enough to slice cleanly.
• Bacon: Adds smoky, salty flavor. You can leave it out for a meatless version.
• Cheddar Cheese: Sharp cheddar balances the tangy tomatoes beautifully.
• Parmesan Cheese: Adds salty, nutty flavor and helps the top brown.
• Heavy Cream: Creates the rich gratin-style sauce.
• Breadcrumbs: Panko gives the crispiest topping, but regular breadcrumbs also work.

How to Make Green Tomato Bacon Gratin

1. Prepare the Tomatoes

Preheat the oven to 375°F. Slice the green tomatoes about ¼-inch thick. Pat them dry with paper towels to remove excess moisture.

2. Cook the Bacon

Cook the bacon until crispy, then crumble and set aside. Reserve a small amount of bacon for topping if desired.

3. Layer the Casserole

Grease a 9×9 baking dish. Layer half of the green tomatoes, onion, garlic, bacon, cheddar cheese, and Parmesan cheese. Repeat with the remaining tomatoes, onion, bacon, and cheese.

4. Add the Cream

Pour the heavy cream evenly over the layered tomatoes. Sprinkle with Italian seasoning, salt, pepper, and red pepper flakes if using.

5. Add the Breadcrumb Topping

Mix the breadcrumbs with melted butter, then sprinkle evenly over the top of the gratin.

6. Bake

Bake uncovered for 30–35 minutes, or until the tomatoes are tender, the filling is bubbling, and the topping is golden brown.

7. Rest and Serve

Let the gratin rest for 5–10 minutes before serving. Garnish with fresh parsley or basil if desired.

What to Serve With Green Tomato Bacon Gratin

• Roasted Chicken
• Pork Chops
• Meatloaf
• Grilled Steak
• Fried Chicken
• BBQ Ribs
• Pot Roast
• Simple Green Salad

Expert Tips

• Pat the tomato slices dry so the casserole does not become watery.
• Use firm green tomatoes, not tomatoes that are starting to ripen.
• Let the gratin rest before serving so the cream sauce can thicken slightly.
• Use sharp cheddar for the best flavor.
• Broil for 1–2 minutes at the end if you want an extra golden topping.
• Add bacon on top after baking for extra crunch.

Recipe Variations

• Vegetarian Version: Leave out the bacon and add extra Parmesan or sautéed mushrooms.
• Spicy Version: Add jalapeños or extra red pepper flakes.
• Southern Version: Add a little cornmeal to the breadcrumb topping.
• Three Cheese Version: Add mozzarella or Monterey Jack.
• Tomato Pie Style: Add a thin layer of mayonnaise mixed with cheese before baking.
• Herb Version: Add fresh basil, thyme, or parsley.

Storage and Reheating

Store leftovers in an airtight container in the refrigerator for up to 3 days.

Reheat in the oven at 350°F until warmed through. The microwave works too, but the breadcrumb topping will be softer.

This dish is best served fresh because green tomatoes can release extra moisture as they sit.

Nutrition Information

Estimated nutrition per serving:

• Calories: 360
• Protein: 12g
• Carbohydrates: 16g
• Fat: 28g
• Fiber: 3g
• Sodium: 620mg

Frequently Asked Questions

What can I do with green tomatoes besides fry them?

Green tomatoes are great in casseroles, gratins, relishes, chutneys, salsas, and baked side dishes like this cheesy green tomato gratin.

Can I use red tomatoes instead?

Red tomatoes are much juicier and sweeter, so they may make the casserole watery. Firm green tomatoes work best for this recipe.

Can I make this ahead of time?

You can assemble it a few hours ahead, but for the best texture, add the breadcrumb topping right before baking.

Is this similar to fried green tomatoes?

It uses the same tangy green tomato flavor, but instead of frying individual slices, the tomatoes are baked into a creamy, cheesy casserole.

This Green Tomato Bacon Gratin is a cozy, cheesy, Southern-inspired comfort food casserole and a delicious way to use green tomatoes from the garden.

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