Cheesy Tomato Egg Gratin

Tomato Egg and Cheese Gratin.

This cheesy tomato egg gratin is based on my grandmother’s recipe and you’ll love it because it’s easy to assemble, make ahead and works as a starter, vegetarian main course, side dish or brunch entree. You have to appreciate that kind of versatility.

Cheesy Tomato Egg Gratin | Garlic + Zest

This is turning out to be a real comfort-food week.  It must be the cold weather — I’m nesting.  And for me there’s nothing that screams comfort food more than this heavenly rich, cheesy tomato egg gratin courtesy of my grandmother, Madou.   

Cheesy Tomato Egg Gratin | Garlic + Zest

She would fix this luscious egg bake as a first course for family dinners and it was always one of my favorites.  I don’t make it very often, but when I do, I generally serve it alongside a roast chicken or other protein, though, it would make a very satisfying Meatless Monday main course.

Cheesy Tomato Egg Gratin | Garlic + Zest
Cheesy Tomato Egg Gratin | Garlic + Zest

The cheese infused bechamel takes ordinary ingredients like tomatoes and eggs and elevates them into something really special.

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Cheesy Tomato Egg Gratin | Garlic + Zest
Cheesy Tomato Egg Gratin | Garlic + Zest

My spin on this dish is the sauteed kale.  Madou never added it, but it really works well in this combination.

Cheesy Tomato Egg Gratin | Garlic + Zest
Cheesy Tomato Egg Gratin | Garlic + Zest

The key to this gratin is the eggs.  They can’t be overcooked.  They should be soft and a little wet.  You can achieve this by cooking them on a very low (and I mean excruciatingly low) heat and stirring constantly.  It took me 12 minutes to scramble these eggs. 

Cheesy Tomato Egg Gratin | Garlic + Zest
Cheesy Tomato Egg Gratin | Garlic + Zest

Layer the casserole starting with a smear of bechamel on the bottom of the dish, then the sauteed kale and tomatoes.  Mound a spoonful of the egg on top of each tomato half and smother the whole thing in that savory cheese sauce.  A few sprinkles of extra grated cheese will ensure a gooey, golden finish.

You can enjoy this tomato and egg gratin as a starter, side dish or a vegetarian meal. Though the combination sounds unusual, the flavors are amazing.

Cheesy Tomato Egg Gratin on a spoon

 More gratin recipes:

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5 from 4 votes

Rich Tomato and Egg Gratin

This is a riff on a dish my grandmother has made all my life.  She’d serve it as an appetizer for a large group, but I think it makes a great vegetarian meal, or a delightfully different brunch casserole!
Author: Lisa Lotts
Course Main Course
Cuisine French
Keyword baked tomatoes, bechamel, eggs
Prep Time 25 minutes
Cook Time 25 minutes
Total Time 50 minutes
Servings 6


  • 4 tablespoons butter divided
  • 3 tablespoons flour
  • 1 teaspoon kosher salt divided
  • ¼ teaspoon white pepper
  • 1 ½ cups milk
  • 3 tablespoons water
  • 3-4 cups kale tough stems removed, chopped
  • 3 medium tomatoes sliced in half crosswise
  • 6 extra large eggs or 7 large eggs
  • 1 ¼ cups comte gruyere or emmental cheese, shredded


  • Preheat the oven to 375°.
  • Spray a small casserole dish with vegetable spray and set aside.
  • In a small saucepan, melt two tablespoons of butter over medium high heat. Sprinkle the flour, 1/4 teaspoon kosher salt and the white pepper into the melted butter and whisk until well combined and bubbly. Gradually add the milk stirring constantly and scraping the sides. Heat until the mixture begins to bubble and cook for one minute, stirring constantly until it thickens. Remove from heat stir in 1 cup of the cheese until its melty and gooey. Spoon 2-3 tablespoons of the cheese sauce into the bottom of the casserole dish. Set aside.
  • In a medium pan with a lid, add the water to the pan and heat over medium high heat until water almost boils. Stir in the kale, sprinkle with 1/4 teaspoon salt, cover with lid and reduce heat to medium-medium low, cooking just until the kale wilts and water has mostly evaporated — about 2-3 minutes. Transfer the kale to the casserole dish, spreading it evenly over the bottom.
  • Remove the watery seeds from the tomatoes and arrange cut side up in the casserole dish. Sprinkle with 1/4 teaspoon salt.
  • Whisk the eggs and 1/4 teaspoon salt in a small bowl. Melt 2 tablespoons butter over medium low heat in the pan that you cooked the kale in and add the eggs. Continue to whisk the eggs until you have a very soft scramble, stirring constantly. (Eggs should be very soft and a little wet).
  • Evenly divide the scrambled eggs over the tomatoes. Spoon the cheese sauce over the gratin (note: sauce will be very thick) and sprinkle with remaining cheese.
  • Bake for 20 minutes, then turn the broiler onto high and cook for 3-4 minutes more until the top begins to brown. Let the gratin rest for 5 minutes before serving.


Calories: 330kcal | Carbohydrates: 9g | Protein: 19g | Fat: 24g | Saturated Fat: 12g | Cholesterol: 264mg | Sodium: 666mg | Potassium: 381mg | Sugar: 3g | Vitamin A: 4370IU | Vitamin C: 42.3mg | Calcium: 431mg | Iron: 1.7mg

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Need a homestyle casserole recipe? Cheesy Tomato Egg Gratin Is a great first course or vegetarian main with soft scrambled eggs and a rich béchamel sauce.

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  1. This looks heavenly!! Pure comfort on a plate; I bet those eggs are just perfect even if they do take ages to cook! The egg, the béchamel and all the other flavours make this a definite winner!

  2. 5 stars
    Lisa! It’s lunch time and all I’ve got is a peanut butter sandwich- you’re killing me! I kind of adore slow scrambled eggs, but I never ever thought about adding them to an egg with sauce! DELICIOUS! (And wow, your grandma could sure cook!)

  3. 5 stars
    I’ve never seen anything like this!! I love gratin and I love your take on it! I can’t wait to try it. My hubby is going to be so happy when I serve him this!!

    1. I think it must be a “French” thing — because my grandmother was French and most of the things she prepared were French dishes.

  4. I’m a sucker for gratin recipes! This looks delicious. Perfect addition to Thanksgiving menu.

  5. This definitely looks like the perfect comfort food!

  6. westviamidwest says:

    Eggs are hard sometimes…. but your explanations take the difficulty right out of it. Pinning this to make soon!

    1. Taking your time with the eggs – and the indulgent knob of butter help make the eggs soft and “just so”

  7. Andcakestoo says:

    You have it so right on point. It’s veggies taken to a whole new level 🙂

  8. Yum, I have never tried egg gratin but this looks delicious!!! I will have to give this recipe a try. Thanks for sharing!

    1. There’s a lot of things going on in this dish!

  9. Now that is real comfort food for sure. I’m not a very cheesy person…. but this looks out of this world! I actually want it!

  10. 5 stars
    What a gorgeous brunch! I also cook my eggs excruciatingly low – they turn out so well when you cook them like that. I am going to make this next time I have house guests, but maybe with spinach instead of kale.

    1. Wow, thanks Elizabeth! I appreciate it. It’s so good!

  11. Words can’t describe how delicious this looks to me right now!!

  12. Betty Burdick says:

    Yum – what a great recipe, can’t wait to try!

    1. Thanks, Betty – wish I could take credit, but this one is my grandmother’s (minus the kale).