I believe I have mentioned before that I love zucchini. And this gratin, based on a recipe I found on the I Breathe I’m Hungry site, is just one more reason why I cherish the fruit of the zucchini plant. And yes, botanically speaking, zucchini is a fruit. A type of botanical berry called a “pepo”, being the swollen ovary of the zucchini flower. (I bet that’s more than you ever wanted to know about a zucchini, right? But I remain adamant about keeping you riveted by information that you most likely would never learn by watching a cooking show on the Food Network. Beneficial “how to” shows like Cupcake Wars or World’s Worst Cooks, for example.) Leaving sarcasm behind, I shall now get back to the real topic of this recipe preface. (Sometimes I just can’t stop myself. I really should have made political analysis my career. But in retrospect, I’m very glad I did not. At least everyone is still speaking to me today, rather than only half the population. What a world we find ourselves in now !!)   

As I was saying, before I was so rudely interrupted by the recently revealed caustic side of my psyche, this gratin recipe perfectly displays the humble zucchini as a star ingredient. OK, the Pepper Jack cheese, caramelized onion, butter, and heavy cream help. But the zucchini is still the team leader.

So if you want a truly delicious, easy to prepare, and perfect vegetarian main dish or side dish, this is the recipe for you. Enjoy 

• 2 tsp. extra virgin olive oil
• 1 small yellow onion, finely chopped
• 2 – 6 or 7-inch zucchini
• 2 T. unsalted butter
• ½ tsp. granulated garlic
• ½ c. heavy whipping cream
• ¼ tsp. xanthan gum*
• kosher salt
• freshly ground black pepper
• 1½ c. grated Pepper Jack cheese or cheese of choice
• 1/3 c. grated Parmesan cheese, or more to taste

Heat the olive oil in a fry pan. Add the chopped onion and cook (stirring frequently) over low heat until the onion is nicely caramelized (a light golden brown). Remove from heat and set aside.

Meanwhile, slice the zucchini on the diagonal about ¼-inch thick. Lay the pieces on paper towels. Cover with more paper towels until needed. (This step helps eliminate the cut zucchini from releasing moisture (weeping) while other recipe preparations are being performed.) 

Combine the butter, granulated garlic, heavy cream, and xanthan gum in a small sauce pan. Over low heat, whisk until the butter has melted and the sauce is smooth. Set aside. 

Butter a 7×11 or 9×9-inch casserole, Pyrex pan, or metal baking pan.

Layer 1/3 of the sliced zucchini then 1/3 of the caramelized onion in the greased pan. Season lightly with salt and pepper, then sprinkle with half of the grated Pepper Jack cheese.

Repeat two more times until you have three layers and have used up all of the zucchini, onions, and grated cheese. (There will only be two layers of the Pepper Jack cheese.)

Gently pour the butter and cream mixture evenly over the top. Sprinkle with Parmesan cheese.

Bake in a pre-heated 400 degree oven for about 30 minutes. Turn off the oven and allow the gratin to sit in the cooling oven for 15 minutes. Remove pan from oven and allow gratin to rest for another 10 minutes or longer. (Allowing the casserole to “rest” helps the gratin set up.) Serve warm.

*From the Bob’s Red Mill flour people: “Xanthan Gum is a plant-based thickening and stabilizing agent. It is named for the bacteria, Xanthomonas campestris, which plays a crucial role in this description. Technically speaking, xanthan gum is a polysaccharide, which is just a fancy way to say “a string of multiple sugars.” To create xanthan gum, the Xanthomonas campestris bacterium is allowed to ferment on a sugar. The result is a gel that is then dried and milled to create the powder substance.

Xanthan gum has a number of powerful properties. First, it works as an emulsifier, encouraging liquids that normally don’t like one another to mix together. Second, it works as thickener, increasing the viscosity of liquids and batters. Third, it can create a creamy texture.

In the world of gluten-free baking, xanthan gum plays the crucial role of imitating gluten. In baking, gluten is what makes dough “doughy.” It gives the dough elasticity, as well as viscosity. Those properties help to hold a cookie together while it bakes on a sheet in the oven, and they enable cakes and breads to hold onto the gas bubbles that form inside them – this allows them to rise and take shape. Xanthan gum helps replicate these properties in recipes that do not contain gluten. Shop online today to buy xanthan gum for all your gluten free baking adventures.”