Zucchini Mushroom Gratin…

It’s that time of year again. I’ve already harvested five zucchinis from my one zucchini plant and by the looks of things there are plenty more to come. This is the time of year that I start scrambling to locate as many zucchini recipes as I can find so that I don’t waste one precious home-grown squash. And although I am always on the lookout for new recipes, I also have some tried and true ones that I look forward to making every year at this time as well.

A zucchini from my garden...

A zucchini from my garden…

One of my all time favorites is a version of a recipe from Ina Garten. I’ve mentioned Ina several times in this blog. She is a cook that inspired me not only to make new and different things but to believe that I can and be successful at it.

I’d never heard the term gratin before I made this recipe and it’s a term that I found is not in most fledgling cooks’ vocabularies. A gratin originated in French cuisine and it simply means a dish that is topped with a browned crust achieved either through a baking or broiling process. You can make a gratin out of just about anything, potatoes, artichokes, cauliflower – you name it. I especially like to make a zucchini gratin since it is not only delicious but also another recipe in my arsenal to deal with the onslaught of zucchini I get at this time of year.

My very happy zucchini plant...

My very happy zucchini plant…

I saw Ina make her recipe on a Food Network episode and I’ve been making it ever since. I have amended it to appeal to my personal tastes but the basis of the recipe is Ina’s (if you want to see her recipe it is on the Food Network site). So I will rate her recipe and then include my version of it for you to try.

Recipe Rating: A++++++++ This is definitely one of the best recipes ever. It is easy to make and a great accompaniment to any meal. A hint of nutmeg gives wonderful flavor to this recipe. I highly recommend trying this one!

Saute the zucchini and mushrooms gently...

Saute the zucchini and mushrooms gently…

Lesson Learned 1- Sautee the zucchini and mushrooms gently: Ina’s recipe calls for cooking the zucchini covered for about 10 minutes before making the white sauce. In my experience, cooking the zucchini for that amount of time made it limp before you even put it in the oven. I cook my zucchini and mushrooms for five minutes just to take the “edge” off of them and let the oven do the rest. That way when you serve the gratin the vegetables still have some body.

Lesson Learned 2- Making a white sauce: This recipe includes making a simple white sauce for the zucchini and mushrooms to simmer in. The first step is to add flour to the zucchini/mushroom mixture. Make sure you cook that flour for at least a minute before you add the milk. It will create a whitish looking goo on the vegetables but don’t worry about that. Just keep stirring until it’s time to add the milk. The reason you cook it for a minute is to get rid of any floury taste. You certainly don’t want your white sauce to taste like flour. Once you add the milk the whitish goo will begin to disappear right before your eyes and you will wind up with a rich, thick white sauce.

Cook until the sauce becomes rich and thick...

Cook until the sauce becomes rich and thick…

Lesson Learned 3 – Bread crumbs versus croutons: Last week I made a hash brown casserole that called for a crushed crouton topping. I loved it so much on that recipe that I tried it on this one and it turned out perfectly. The original recipe stipulates to cover the top with bread crumbs mixed with grated Gruyere cheese. Maybe if you made home made bread crumbs the end result would be similar to that of using croutons, but I thought the croutons added a greater crunch and more flavor. You can try topping it either way but at this point I prefer the crushed croutons.

Lesson Learned 4 – A little nutmeg goes a long way: I’d never cooked with nutmeg before I made this recipe and I can tell you it adds a great depth to the gratin but you need to be careful when you use it. A little bit of nutmeg goes a long way and it can easily overpower a dish if you use too much. My advice is to use exactly what the recipe recommends. Then in subsequent bakings try to vary the proportion. My guess is that if you choose to vary it, it will be for a lesser rather than a greater amount.

Lesson Learned 5 – Oven times vary: This seems to be a regular “lesson learned” in my recent posts but rarely does a dish come out of my oven the way it is supposed to in the time written in a recipe. I assume that part of the issue is living in high altitude and the other is how my oven is calibrated. The original recipe says to bake the gratin in the oven for 20 minutes. In order for me to get a nice bubbly casserole I have to bake mine for 40-45 minutes. This is where it can get somewhat frustrating for the fledgling cook. But never fear, in time you will learn the ins and outs of your oven and be able to plan accordingly.

Place the croutons in a bag and crush with a rolling pin...

Place the croutons in a bag and crush with a rolling pin…

The beauty of this recipe is that it’s not difficult to make but tastes like you slaved all day in the kitchen. Over time, because the directions are so true to form, I’ve not gleaned a lot of lessons learned making it and I view that as the beauty of the recipe. It is the kind where you can be successful making it the first time and every time. If you’re like me at this time of year, desperately searching for various ways to cook my zucchini crop, this recipe is a must. Try it – I know you’ll like it as much as I do.

Zucchini Mushroom Gratin

  • Servings: 4-6
  • Difficulty: Easy
  • Print

Brown and bubbly out of the oven...

Brown and bubbly out of the oven…

INGREDIENTS:

3 Tbs. butter (plus some for on top of the crushed croutons)

1 medium size onion, diced

2-3 medium zucchini cut in to 1/4 inch rounds

4-6 ounces of portobella mushrooms cut in thick slices

1/8 tsp. nutmeg

2 Tbs. flour

1 cup warm milk

3/4 cup crushed croutons or bread crumbs

1 cup grated Gruyere cheese, divided

Salt and pepper to taste

Flat leaf parsley for garnish

DIRECTIONS:

Preheat the oven to 400 degrees. Pour the milk into a saucepan and warm under a very low heat (you don’t want the milk to boil, you just want to get the chill out of it). Grate the Gruyere, dice the onions and slice the zucchini and mushrooms and set aside. Put the croutons in a plastic bag, seal the bag and crush them with a rolling pin. Set the bag aside.

Melt the butter in a large sauté pan. Add the onions and cook under low to medium heat until translucent (about 5-7 minutes). Add the zucchini and mushrooms, cover the pan and cook for about 5 minutes (you do not want the zucchini to be limp). Uncover, salt and pepper to taste and add the nutmeg.

Stir in the flour. Cook for at least one minute. Add the warm milk and 1/4 cup grated Gruyere cheese and cook over a low heat until the sauce thickens. Pour the mixture into a 1 1/2 – 2 quart baking dish.

Combine the croutons (or bread crumbs) with the remaining Gruyere and sprinkle on top of the zucchini mixture. Dot with small amounts of butter and bake until bubbly and browned. (the original recipe called for the casserole to bake for 20 minutes, I had to bake mine for 40-45 minutes).

Let sit for 5 minutes, garnish with chopped flat leaf parsley and serve.

 

Ready to go into the oven...

Ready to go into the oven…

 

Brown and bubbly out of the oven...

Brown and bubbly out of the oven…

Serving Suggestion: garnish with flat leaf parsley...

Serving Suggestion: garnish with flat leaf parsley…

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