Zucchini and Tomato Au Gratin

Zucchini and Tomato Au Gratin

Summer is the perfect time to make this delicious Zucchini and Tomato Au Gratin. Packed with flavor and oozing with cheesy goodness, it’s the perfect side to any main dish!

Spoonful of zucchini and tomato au gratin

My grandmother was an amazing cook! Just walking into her house, bold aromas would hit your nose. Instantly, you couldn’t wait to get to the kitchen to see what she was cooking up that day. With a taste here and there, she knew exactly what ingredients to add to create a masterpiece. One bite is all it took and you’d be hooked on her cooking.

This Zucchini and Tomato Au Gratin is a favorite side of mine that she used to make. It’s super delicious and easy to put together. In addition, it goes well with steak, chicken and pork. Summer is a great time to make this dish, as fresh zucchini is in abundance at the grocery store.

Fun Facts!

  1. Zucchini is a variety of summer squash that can be eaten raw or cooked.
  2. The word “zucchini” comes from the Italian word “zucca” which means squash.
  3. The Italians brought zucchini to the United States in the 1920s.
  4. April 25th is National Zucchini Bread Day.
  5. Zucchini s most often referred to as a vegetable but it’s actually a fruit!
  6. The flowers of a zucchini are edible and often fried.
  7. Zucchini are most often dark green but some range in color from yellow-green to black.
  8. The longest zucchini measures 8ft 3.3 inches and was grown by Giovanni Batista Scozzafava.
  9. Zucchini leaves and stems have small prickly trichomes (plant hairs).
  10. It’s the only fruit that starts with the letter Z.

Zucchini and Tomato Au Gratin-Ingredients

Pepper, bread crumbs, salt, zucchini, extra sharp cheddar cheese, butter, onion, garlic and tomatoes.

pepper, bread crumbs, salt, zucchini, extra sharp cheddar cheese, butter, onion, cherry tomatoes, garlic

Zucchini and Tomato Au Gratin-Instructions

  • Wash zucchini and tomatoes.
  • Cut tomatoes in half.
  • Although you can leave the skin on the zucchini, I like to “zebra” the zucchini. Leaving some white and green. Take a knife and work your way down the zucchini to peel. Keep about a 1/4 inch of green and repeat. Cut zucchini into about 1/2 inch rounds.
  • Dice about a 1/2 onion (1/4 cup). Peel garlic clove and mince.
  • Add 2 tablespoons of butter, onion and garlic to a pan and sauté until onions are tender.
Onions, butter and garlic sautéing in a pan
  • Add cut zucchini rounds to the pan. Over medium heat, sauté zucchini until tender (15-20 minutes).
zucchini rounds, salt, pepper in a sauté pan
  • Use a slotted spoon. Layer zucchini on the bottom of the casserole dish.
  • Add 1/2 of the cut tomatoes, shredded cheese and repeat.
Cooked zucchini, tomatoes, cheese layered in a casserole dish
  • In a small pan, add butter and bread crumbs. You can use store bought ones or fresh bread crumbs. My grandmother always “made her own” bread crumbs. To make fresh crumbs, grate 2 hamburger buns or 2-3 hot dot buns.
  • Over medium heat, stir until bread crumbs are crisp and brown.
  • Add bread crumbs to the top.
zucchini ad tomato au gratin
  • Bake for 25-30 minutes or until bubbly.
  • Scoop and enjoy!
Zucchini and tomato au gratin

Left overs can be refrigerated for up to 3 days.

Make Ahead of Time

Short on time? Planning for a party? A great thing about this side is that it can be made ahead of time. Simply follow all the steps, put ingredients together in the casserole dish and refrigerate. Take casserole out of the refrigerator. Keep at room temperature for about 30 minutes, then bake in a preheated oven for 25-30 minutes or until bubbly.

For other delicious vegetable sides try our:

Brussels Sprouts with Bacon

Grilled Parmesan Potato Wedges

Easy Grilled Vegetables

Potatoes Au Gratin

Ultimate Twice Baked Potatoes

Fresh Zucchini and Tomato Tart

Zucchini and Tomato Au Gratin

Zucchini and Tomato Au Gratin

Summer is the perfect time to make this delicious Zucchini and Tomato Au Gratin. Packed with flavor and oozing with cheesy goodness, it's the perfect side to any main dish!
Prep Time 15 minutes
Cook Time 45 minutes
Total Time 1 hour
Course Side Dish
Cuisine American
Servings 6 servings

Equipment

  • Sauté Pan
  • Casserole dish

Ingredients
  

  • 2 tbsp butter
  • 1/4 cup onion diced/chopped
  • 1 clove garlic minced
  • 2 lbs zucchini cut into 1/2 inch rounds
  • 1 pint cherry tomatoes cut in half
  • 1 1/2 cups extra sharp cheddar cheese shredded
  • salt and pepper to taste

Bread Crumb Topping

  • 1 1/2 cups bread crumbs fresh or packaged
  • 2 tbsp butter

Instructions
 

  • Wash zucchini and tomatoes. Cut tomatoes in half.
  • Dice onion.
  • Peel garlic clove and mince.
  • Add 2 tablespoons of butter, onion and garlic to a pan and sauté until onions are tender.
  • Cut zucchini into about 1/2 inch rounds.
  • Add zucchini rounds to pan. Over medium heat, sauté zucchini until tender.
  • Use a slotted spoon. Layer zucchini on the bottom of the casserole dish.
  • Add 1/2 of the cut tomatoes, shredded cheese and repeat.

Bread Crumb Topping

  • In a small pan, add butter and bread crumbs.
  • Over medium heat, stir until bread crumbs are crisp and brown.
  • Add bread crumbs to the top.
  • Bake for 25-30 minutes or until bubbly.
  • Enjoy!
Keyword Bread Crumb Topping, Garlic, Onions, Tomatoes, Zucchini, Zucchini and Tomato Au Gratin, Zucchini and Tomato Casserole, Zucchini Au Gratin, Zucchini Casserole
Zucchini and tomato au gratin
Zucchini and tomato au gratin
Zucchini and tomato au gratin
Zucchini and tomato au gratin
Zucchini and tomato au gratin
Zucchini and tomato au gratin

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