Mayan Heirloom Squash with Tomatoes and Basil is a simple yet delicious way to enjoy this unique variety of squash. Roasting brings out its natural sweetness, while juicy tomatoes and fresh basil add a burst of freshness that complements the squash perfectly.

This is the kind of dish that works beautifully as a side for grilled meats, chicken or fish, but can also be enjoyed as part of a vegetarian meal. With just a handful of ingredients, it lets the natural flavours of the vegetables shine through while creating a colourful and satisfying addition to any table.
What is Mayan Heirloom Squash?
Mayan Heirloom Squash with Tomatoes and Basil is a simple dish that lets the natural flavours of the vegetables shine. Similar to zucchini in flavour and texture, the squash becomes tender when cooked and pairs perfectly with sweet tomatoes and fresh basil.
When I was grocery shopping at Costco here in Canada last week, I came across these bags of Mayan Heirloom Squash and thought they looked rather interesting, so I picked up a bag to try. There was a sample stand featuring them and, from what I could tell, they were simply sautéing them in butter. After trying them myself, I found them to be mild and delicate, making them perfect for simple recipes like this where the fresh ingredients can really stand out.
For those of you who have no idea what Mayan Heirloom Squash is, then this is what they look like:

Calories in Mayan Heirloom Squash with Tomatoes and Basil
This recipe serves 4 and is 82 calories per serving.
If you're looking for more recipes by calories, you'll find plenty of options grouped by calorie range here: Slimming Eats Low Calorie Recipes
If you're following a calorie-controlled diet or a healthy eating plan, it's important to calculate your daily calorie needs using a reliable calorie calculator. The calorie counts provided are estimates and can vary depending on the exact ingredients and portion sizes you use. Using your own calculations helps ensure you're meeting your individual needs. A calorie calculator can help you make informed choices and stay on track with your goals.
See the recipe card for full nutritional estimation.
Ingredients Notes
To make this recipe you will need the following ingredients:
- Mayan Heirloom Squash: Mayan heirloom squash is a small squash with a mild flavour and tender texture, very similar to zucchini/courgette. It cooks quickly and absorbs flavours beautifully. If you cannot find it, zucchini/courgette is the perfect substitute.
- Onion: Thinly sliced onion adds sweetness and flavour as it softens and cooks down with the squash.
- Garlic: Fresh garlic adds plenty of flavour and pairs perfectly with the tomatoes, basil and balsamic vinegar.
- Tomatoes: Fresh tomatoes add colour, freshness and a little acidity to balance the sweetness of the squash and onion.
- Fresh Basil: Basil adds a lovely fresh flavour that works beautifully with the tomatoes and gives the dish a simple Mediterranean-inspired feel.
- Garlic Pepper Seasoning: This seasoning blend contains sea salt, black pepper and garlic granules, making it an easy way to season the dish while adding extra flavour. Adjust the amount to suit your taste.
- Balsamic Vinegar: A small splash adds a touch of sweetness and acidity that brings all the flavours together.
- Olive Oil: Helps carry the flavours and gives the vegetables a silky finish.
Once you've gathered all the ingredients and prepared them accordingly, you're all set to create this easy and delightful recipe.
See the recipe card for specific quantities and instructions.
Variations and Substitutes
There are plenty of ways to adapt this Mayan Heirloom Squash with Tomatoes and Basil depending on what you have on hand, whether you want to change the vegetables or add extra flavour.
- Squash Swap: If you cannot find Mayan heirloom squash, zucchini/courgette is the best substitute and works almost identically in this recipe. Yellow summer squash would also work well.
- Tomatoes: Fresh chopped tomatoes add lovely freshness, but you can use canned tomatoes if preferred. Just be sure to choose a good quality brand, as the flavour of the tomatoes is a key part of the dish. Cherry or grape tomatoes are also great options.
- Extra Vegetables: Sweetcorn works really well in this dish, adding little bursts of sweetness that pair nicely with the tomatoes and basil. Baby spinach is another great addition and can be stirred in at the end until just wilted. Bell peppers, mushrooms or diced zucchini are also delicious additions.
- Onion: Red onion can be used instead of regular onion for a slightly sweeter flavour and a pop of colour.
- Herbs: Fresh basil is the perfect pairing with tomatoes, but fresh parsley, oregano or thyme can also work well. A combination of basil and parsley is particularly delicious.
- Seasoning: If you do not have garlic pepper seasoning, simply use salt, black pepper and a little garlic powder or extra fresh garlic.
- Vary the Acidity: Balsamic vinegar adds a touch of sweetness and acidity, but red wine vinegar, white balsamic vinegar or a squeeze of fresh lemon juice can be used instead.
- Add Cheese: A sprinkle of grated parmesan, crumbled feta or fresh mozzarella makes a delicious addition and pairs beautifully with the tomatoes and basil.
- Make It a Meal: Serve the squash over pasta, quinoa or rice, or add some grilled chicken, prawns/shrimp or chickpeas to turn it into a more substantial meal.
How to Make Mayan Heirloom Squash with Tomatoes and Basil

- Step 1: Half and slice the squash so you have half circle slices

- Step 2: Gather rest of the ingredients

- Step 3: Place a frying pan over a medium, add the olive oil. Fry onion and garlic until softened.

- Step 4: Add the Mayan Heirloom Squash and a few grinds of garlic pepper and fry for a further 5 mins

- Step 5: Add the tomatoes, fresh basil and a splash of balsamic vinegar and continue to cook until all veg is soften.

- Step 6: Then it is all ready to enjoy as a side to any meal you like.
Serving Suggestions
I served mine with a baked sweet potato and a few shavings of fresh parmesan, which worked really well with the tomatoes, basil and balsamic flavours.
This dish also makes a great side for grilled chicken, steak, pork, fish or seafood. You can also serve it over pasta, rice or quinoa for a simple vegetarian meal, or spoon it onto toasted crusty bread for a light lunch.
More Side Dishes
Looking for some more side dish ideas? Check out these:
See more Side Recipes →
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Melanie Williams says
I from uk and there is a total lack of mayan heirloom squash here so may have to try this with Courgette instead. Will let you know how it turns out.
John Scott says
i too found these squashes at Costco. The samples were being sauted in coconut oil (ugh) ( i'll never use it) and absolutely no seasonings. It tasted bland but i liked the texture and the idea so i bought a bag too. Stir fried at home in virgin olive oil and butter and added my favourite seasonings, mixed with other legs. It turned out to be wonderful