Summer Squash Casserole

IMG_2298This recipe stems from two good sources. Sarah Leah Chase credits the Vineyard’s Morning Glory Farm Cookbook for the inspiration behind  the “Martha’s Vineyard-Style Zucchini Casserole” in her New England Open House Cookbook.

I followed the recipes from both books fairly closely, with minor deviations. I added some pesto in addition to the fresh basil, and used more onion. This recipe is definitely worth making during the summer squash season. It easily fed six people as a side dish, with leftovers for the next day.


3 TBS olive oil
2 medium onions cut into 1/4 inch crescent slices
2 bell peppers (yellow, orange, or red) seeded and cut into 1/2 inch strips
3 cloves garlic, minced
2 medium zucchini, cut into 1/4 inch rounds
2 yellow summer squash, cut into 1/4 inch rounds
3 ripe medium tomatoes, chopped (drain off some of the seeds)
3 TBS shredded fresh basil
2 TBS basil pesto (optional, but good
kosher salt and freshly ground pepper
1 cup combination of jack and cheddar cheeses, shredded


1. Heat the oil in a large frying pan over medium heat. Add the onions and peppers and sauté for about 5-6 minutes until softened. Add the garlic and cook for another minute or two until you can smell the garlic.
2. Add the squashes and tomatoes and cook until they are tender. Around 10-12 minutes.
3. Add the shredded basil and pesto. Season with salt and pepper to taste.
4. Pour the mixture into a 13×9 baking dish. Top with the shredded cheese.
5. Bake in a pre-heated 350 degree oven for 25-30 minutes. The casserole should be bubbling with melted cheese on top.

I cooked the vegetables in the morning and put them in the baking dish. I let them cool a bit, covered and refrigerated them. Later in the afternoon, I took the dish out of the refrigerator to bring it back to room temperature. About 45 minutes before dinner, I sprinkled the cheese on top and baked the casserole.


About Mary Jane

I am a retired English teacher. My husband, Frank, and I have lived on Cape Cod since 2000. I am a lifelong bread baker and writer and have been posting a blog on Falmouth Patch for the last few years. Savory Seasons has been largely devoted to recipes and food in general. I am hoping to expand my focus in this new blog.
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