This “full-of-the-earth,” Summer Squash Casserole recipe is a delicious garden dump dish full of herbs, zucchini, tomatoes, and cheese!

white plate with a serving of summer squash casserole

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Layer together harvested zucchini (both green and yellow), or your favorite squash, to make a healthy Summer Squash Casserole. Watch the video to see how easy it is!

Summer Squash Casserole

For our family, a summer meal is often a vegetarian dish! But what I love about this recipe is you can add chicken (or any other leftover meat), and it’s also pasta-free!

Think “garden dump,” which means, what do you have growing in your garden right now? Zucchini, tomatoes, and fresh herbs?

fresh garden dump casserole

Easy dinner casseroles

If your a lover of easy casseroles for dinner, then this recipe is for you! Layer, bake, and serve! Or, you may even love this Coconut Salmon Zucchini Noodle Bowl Recipe!

plate of Summer Squash Casserole

Ingredients for squash casserole

All you need for this recipe is:

  • Zucchini (yellow and green)
  • Fresh cilantro or basil or dill
  • Cheese
  • Pesto
  • Red onion
  • Tomatoes
  • Salt and pepper

zucchini and pesto

More Zucchini recipes to try:

We love recipes with zucchini, like these Chocolate Zucchini Muffins, Zucchini Black Bean Quesadillas, and Carrot Pineapple Zucchini Bread.

Also, try my friend Gina’s Crustless Summer Zucchini Pie!

making a Summer Squash Casserole

Garden Dump Casserole

The casserole is not only pretty, it’s also so good for you! But wait … when you serve it, it’s a little messy. :) It can be a little watery, so use a slotted spoon or spatula to dish it up.

9x13 pan Summer Squash Casserole with fresh basil

There’s really no right or wrong way to make this–it essentially uses sliced squash in place of pasta.

melted cheese on tomatoes on Summer Squash Casserole

We’ve even baked this casserole while camping in our Camp Chef Outdoor Camp Oven [affiliate link]. I love this little oven, because it holds a 9×13 pan!

Make ahead at home, and then bake at 400 degrees for 40 minutes (covered with foil).

Seriously, this is our new favorite summer recipe–healthy, starch free, and full of the earth!


white plate with a serving of summer squash casserole
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Summer Squash Casserole

Prep Time: 15 minutes
Cook Time: 45 minutes
Total Time: 1 hour
Yield: 6
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  • 2-3 medium zucchini, sliced 1/2 inch thick
  • 1 medium yellow zucchini, sliced 1/2 inch thick
  • Fresh cilantro or basil or dill, chopped (or all 3) – use a lot
  • 3 cups cheese, we used Sharp Cheddar
  • 1/2 cup pesto
  • 1/2 large red onion, sliced
  • 3 medium tomatoes, sliced
  • Salt and pepper


  • Preheat oven to 400. Grease or spray a 9×13 pan. Layer the bottom with sliced squash. Spread 1/2 the pesto over the sliced squash, 1/2 of the zucchini slices, 1 cup of cheese, red onion, 1/2 of the fresh herbs, and salt and pepper.
  • Repeat above step, ending with sliced tomatoes on top.
  • Place a large piece of foil over the pan to seal.
  • Bake at 400 for 35-40 minutes, until squash is tender but not overcooked (use a fork to test if it is soft, but do not over cook).
  • Remove foil; let sit for 10 minutes before serving.


reposted from JULY 2017
Cuisine: American
Course: Main Course
Did you make this recipe?Tag @reluctantentertainer on Instagram and hashtag it #reluctantentertainer!

summer squash casserole on a white plate