Zucchini and Yellow Squash Au Gratin. Zucchini Gratin with Yellow Squash is a luscious creamy cheesy medley of zucchini, yellow squash, onions and garlic. It is quick and easy to prepare. It will make a summer squash lover out of you!

This Easy Au Gratin Zucchini Squash Bake Recipe is a hit with the family and it's been a keto recipe we tend to keep on our weekly meal rotation. Dinner has a new favorite keto side dish…satisfying, delicious and fits perfectly into the keto diet. Summer is for enjoying the outdoors. You can have Zucchini and Yellow Squash Au Gratin using 13 ingredients and 6 steps. Here is how you cook that.

Ingredients of Zucchini and Yellow Squash Au Gratin

Prepare 1 of medium zucchini.
Prepare 1 of medium yellow squash.
It's 1 tbsp. of unsalted butter.
You need 2 cloves of garlic, minced.
It's 1/2 cup of heavy cream or whole milk.
It's 1 tsp. of cornstarch.
It's 1/2 tsp. of salt, divided.
It's 1/2 tsp. of pepper, divided.
You need 1/4 tsp. of dried oregano.
It's 1/4 tsp. of dried chives.
Prepare 1/8 tsp. of onion powder.
It's 1/4 cup of freshly shredded parmesan.
Prepare 1/2 cup of freshly shredded gouda cheese.

Kayaking down a river, going for a family walk, swimming by the pool, or heading out for a bike ride, activities rule the weekends in the summer. This broiled zucchini side dish stars baby zucchini, a pint-sized, more tender version of zucchini. Find baby zucchini at the farmer's market or in the produce section of Whole Foods. Flashing the vegetables under the broiler for a few minutes adds a touch of char to the zucchini and mellows the bite of the radishes.

Zucchini and Yellow Squash Au Gratin instructions

Preheat the oven to 350°F. Lightly grease an 8x8" baking pan and set it aside..
Wash the zucchini and yellow squash, then slice them into coins about 1/4" thick. Place them into a bowl and season them with 1/4 tsp each salt, pepper and oregano. Set aside..
Melt the butter in a small saucepan over med-high heat. Once it's melted, add the garlic and stir until fragrant. Then pour in the cream (or milk) and whisk in the cornstarch, the onion powder and 1/4 tsp each of salt, pepper and chives. Allow this to come to a simmer and simmer until thickened...just about 2-3 minutes. Once thickened, remove from the heat and stir in the parmesan cheese..
Lay out the squash in the prepared baking pan. Pour the cream mixture over the top. Sprinkle the gouda evenly over the top..
Bake for 12-15 minutes, until the squash is fork tender. Switch your oven to broil and let the cheese brown for 2-3 minutes..
Remove the pan from the oven and let it sit for 5 or so minutes, then serve..

After an afternoon of sugar and treats, I decided to put together a simple vegetable gratin, starring the enormous zucchini that we pulled out of our garden a few days ago. I layered the zucchini slices, along with slices of yellow squash and tomato, and added just enough fresh basil and grated Parmesan cheese for a great herb-cheese flavor. It is quick and easy to prepare. Layer half the zucchini in prepared dish. Combine milk, cream and eggs in small bowl.