This is one of my favorites for using up fresh summer vegetables that can be found in abundance both at the grocery store and the farmer’s market. This is also a versatile recipe so feel free to substitute other veggies that you have on hand. I keep this summer veggie casserole recipe for summer and even for our fall menu rotation.

let’s make summer veggie casserole recipe
Layer the veggies and rice like lasagna and then pour a tangy vinaigrette over it all and bake. The only drawback in the summer is heating up the oven for such a long time. To make the most of it, I wrap potatoes and sweet potatoes in foil so they can bake alongside the casserole and make for an easy lunch or dinner the next day!
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summer veggie casserole ingredients
- Summer squash (thinly sliced)
- Tomatoes (thinly sliced)
- Zucchini (cut in dice)
- Bell pepper (cut in dice)
- Carrots (cut in dice)
- Celery (cut in dice)
- Mushrooms or any other ripe summer produce you have on hand.
- 2-3 cups rice (if you want to use brown rice, precook it for at least 25 minutes)
- Provolone, mozzarella, or muenster cheese (or a combination of cheeses)
- Simple vinaigrette (combine 1/3 cup olive oil, 2 tablespoons white wine vinegar, 2 tablespoons parsley, 3 teaspoon salt, and 3/4 teaspoon pepper)
directions to cook summer veggie casserole
Step 1
In a baking dish, place layers of sliced squash followed by a mixture of diced veggies.
Step 2
Sprinkle half the amount of rice over the veggies.
Step 3
Next layer the sliced tomatoes.
Step 4
Repeat the layering process again.
Step 5
Finish with a layer of tomatoes.
Step 6
Pour vinaigrette all over.
Step 7
Cover and bake for 1 hour and 25 minutes at 350 degrees.
Step 8
Remove the cover, top it with cheese and bake for an additional 15 minutes.
our experience making the summer veggie casserole
So, when you have an abundance of ripe tomatoes and summer squash, throw this all together and enjoy a one-dish wonder. It also freezes well so you could experience those summer veggies on a cold winter day.
By the way, I adapted this recipe from In the Kitchen with Mary and Martha: One Dish Wonders (Mary & Martha, a great cookbook!
Summer Veggie Casserole Recipe

This easy veggie casserole recipe is likely to turn on even those picky eaters. Who would go against this delicious and healthy veggie recipe, especially if it is topped with your favorite cheese!
Ingredients
- Summer squash (thinly sliced)
- Tomatoes (thinly sliced)
- Zucchini (cut in dice)
- Bell pepper (cut in dice)
- Carrots (cut in dice)
- Celery (cut in dice)
- Mushrooms or any other ripe summer produce you have on hand.
- 2-3 cups rice (if you want to use brown rice, precook it for at least 25 minutes)
- Provolone, mozzarella, or muenster cheese (or a combination of cheeses)
- Simple vinaigrette (combine 1/3 cup olive oil, 2 tablespoons white wine vinegar, 2 tablespoons parsley, 3 teaspoon salt, and 3/4 teaspoon pepper)
Instructions
- In a baking dish, place layers of sliced squash followed by a mixture of diced veggies.
- Sprinkle half the amount of rice over the veggies.
- Next, layer the sliced tomatoes.
- Repeat the layering process again.
- Finish with a layer of tomatoes.
- Pour vinaigrette all over.
- Cover and bake for 1 hour and 25 minutes at 350 degrees.
- Remove the cover, and top it with cheese and bake for an additional 15 minutes.
more delicious and healthy recipes
Have you tried this veggie casserole recipe? What did your family think? Type in your comments below.
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Confused–uncooked white rice or cooked. If not cooked, 2-3 C is a lot of rice. Not much liquid in recipe-could it be 2/3 C?
Love this idea! Can’t wait to try it. Sounds so yummy!