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We’re getting to that time of year when summer squash is becoming abundant. I’m up to my ears in zucchini and yellow squash – and I’m loving every minute of it. One of these years I need to start planting my own, but until then, the green and yellow squash combination from Costco is just perfect. From zucchini noodles to zucchini fries, there are so many possibilities! And in case you didn’t know, you can use zucchini and yellow squash interchangeably in pretty much any recipe that calls for one or the other. They’re especially versatile in stuffed summer squash recipes.
If I had to pick a favorite way to use up zucchini and yellow squash, any stuffed summer squash recipe would be the clear winner. Not only does it look gorgeous and lend itself to a variety of fillings, it also makes for an easy dinner that leaves only one pan to clean. My husband does the dishes at our house while I do the cooking, but I know he’ll thank me for that one.
The only challenging part about creating stuffed summer squash recipes is figuring out what to call them. Often times, I want to draw attention to so many of the delicious contents. Even though this recipe has only ten ingredients, so many of them seemed important to mention: summer squash, shiitake mushrooms, ground beef, caramelized onions, garlic, and Swiss cheese. How does one even begin to narrow this down? The name I ended up with – stuffed summer squash boats with beef, Shiitake mushrooms & Swiss cheese – is a bit of a mouthful, but I thought it was worth it to point out as many of the flavors as possible.
Shiitake Swiss beef stuffed summer squash boats. Let’s just pretend that rolls off the tongue. Wait, you mean it doesn’t? The taste will make up for it, I promise. It’s actually kind of fitting, now that I think about it, because a big mouthful is exactly what you’ll want when you see these lovely zucchini and yellow squash boats in front of you.
If you haven’t tried shiitake mushrooms before, this recipe is a great way to start. They share some similarities with portobello mushrooms, but have a deeper umami flavor. You can definitely use other types of mushrooms for this dish too, but shiitakes are my favorite, hands down.
The filling in these stuffed yellow squash and zucchini literally melts in your mouth. The earthy mushrooms pair wonderfully with the naturally sweet caramelized onions, browned ground beef, and gooey Swiss cheese. Can you imagine the flavors together?
Excuse me while I go daydream about them…
If you manage to have any left over, these stuffed summer squash boats freeze well, too. (Many of the summer squash recipes here do, too!) I’ll be making a bunch of them to enjoy in the winter, when I know I’ll be missing my summer squash. When you’re craving comfort food later, these will totally do the trick.
Shiitake Swiss Beef Stuffed Summer Squash Boats (Low Carb, Gluten-free):
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Stuffed Summer Squash Boats with Beef, Shiitake Mushrooms & Swiss Cheese
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- 3 large Summer squash (yellow squash and/or zucchini)
- 1 tsp Olive oil
- 1/2 large White onion (chopped)
- 4 oz Shiitake mushrooms (chopped)
- 4 cloves Garlic (minced)
- 1 lb Ground beef
- 3/4 tsp Sea salt (plus additional for sprinkling the squash in step 3)
- 1/2 tsp Black pepper
- 2 tbsp Sour cream
- 3/4 cup Swiss cheese (shredded, divided in two parts)
RECIPE TIPS + VIDEO in the post above, nutrition info + recipe notes below!
Preheat the oven to 400 degrees F (204 degrees C). Line a baking sheet with foil or parchment paper.
- Slice the squash length-wise. Use a melon baller or small spoon to partially hollow out the seedy center of each squash half (this is where the filling will go).
Arrange the squash on the lined baking sheet, cut side up. Sprinkle lightly with sea salt. Bake 15-20 minutes, until almost fully softened.
Meanwhile, heat olive oil in a skillet over medium heat. Add onions and saute about 7-10 minutes, stirring occasionally, until translucent and slightly browned. Add shiitake mushrooms and garlic. Saute 5-7 minutes, stirring occasionally, until the mushrooms are slightly browned and reduced in size.
Turn the heat up to medium high. Add the ground beef to the skillet. Season with sea salt and black pepper. Saute 7-8 minutes, breaking up the pieces with a spatula or spoon, until the beef is browned and the onions are caramelized.
- Remove from heat. Stir in sour cream and half of the shredded Swiss cheese. Spoon the filling into the squash halves.
Bake for 10 minutes, until the squash is cooked through and the filling is bubbly.
Turn the oven to broil. Sprinkle the remaining shredded Swiss cheese evenly on top of the squash boats. Broil 3 minutes, until the cheese is melted and browned.
Serving size: 1 squash boat
NUTRITION INFORMATION PER SERVING
Where does nutrition info come from? Nutrition facts are provided as a courtesy, sourced from the USDA Food Database. You can find individual ingredient carb counts we use in the Low Carb & Keto Food List. Carb count excludes sugar alcohols. Net carb count excludes both fiber and sugar alcohols, because these do not affect blood sugar in most people. We try to be accurate, but feel free to make your own calculations.
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