Vegetarian Black Bean & Butternut Squash Skillet

Welcome to Day 5 of my 5-day Blue Zone Lunch series! Each day this week, I’m sharing a nourishing lunch inspired by one of the five Blue Zones—regions in the world where people live the longest, healthiest lives: Okinawa (Japan), Sardinia (Italy), Loma Linda (California), Ikaria (Greece), and the Nicoya Peninsula (Costa Rica).

While each place has its own culinary traditions, they all share a few key principles: wholesome, plant-forward meals, strong community ties, daily movement, and a deep sense of purpose. These lunches aren’t meant to be exact replicas but rather modern, nutrient-rich takes using high-quality ingredients that reflect the spirit of each region. I wanted to use ingredients that each region is known for and create easy, approachable lunch recipes you can learn to incorporate into your daily routine.

My goal is to show you that it is possible to eat in a way that supports long-term health, without overcomplicating it. These recipes are inspired by the traditions of the world’s longest-living communities—but they’re designed for real life, using simple, nutrient-rich ingredients you can find almost anywhere.

Each day of this series spotlights one of the five Blue Zones and gives you a fresh take on how lunch can be both deeply nourishing and genuinely enjoyable. Whether you’re here for gut health, longevity, or just a more grounded start to your day—I hope you find a recipe (or five) to love.

Today’s recipe is inspired by Nicoya, Costa Rica—a Blue Zone where the day often begins with beans, squash, rice, sunshine, and a strong sense of purpose.

This is my Vegetarian Black Bean & Butternut Squash Skillet.

Am I allowed to say that this recipe is my favorite one out of all five? This lunch recipe is by far, the most doable, realistic one for our busy lives. When I was thinking about the recipe I wanted to create for this blue zone, all I had in mind was beans and squash. These two fiber-packed foods are huge staples in the Nicoyan diet, so I knew I had to include them both into a lunch recipe. This Vegetarian Black Bean & Butternut Squash Skillet is packed with red onion, corn kernels, avocado, cheddar cheese, and of course black beans and squash. It's loaded with color and is packed with the nutrients your body needs to thrive. You can separate the skillet into bowls and enjoy it as is or have it with some rice, tortilla, or chips. It's completely up to you.

According to the Blue Zones website: "Nicoyans regularly take in the sunshine, which helps their bodies produce vitamin D for strong bones and healthy body function. Vitamin D deficiency is associated with a host of problems, such as osteoporosis and heart disease, but regular, “smart” sun exposure (about 15 minutes on the legs and arms) can help supplement your diet and make sure you’re getting enough of this vital nutrient."

Yields: 2-3

Portion: 1 bowl

Prep time: 15 minutes

Cook time: 25 minutes

Total time: 50 minutes

This recipe is gluten free and vegetarian.

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Ingredients:

Butternut squash, half, cubed

1 15oz can, drained and rinsed, black beans 

½ cup corn kernels 

½ red onion, finely diced

½ jalapeño finely diced

Seasonings:

½ tsp cumin

½ tsp chili powder

1 tsp paprika

1 tsp salt

1 ½ tsp garlic powder

Black pepper to taste

Juice of ½ lime  

Cheddar cheese 

½ avocado, sliced, for garnish 

Fresh cilantro, finely diced for garnish 

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Instructions:

1. Roast the butternut squash: Preheat your oven to 400°F. Spread the butternut squash on a baking sheet, drizzle with olive oil, and season lightly with salt and pepper. Roast for about 25–30 minutes, flipping halfway through, until tender.

2. Sauté aromatics: While squash roasts, heat a large skillet over medium heat with a drizzle of olive oil. Add red onion and cook for 3–4 minutes until soft. Stir in the jalapeño and cook for another minute. Add cumin, chili powder, paprika, garlic powder, salt, and black pepper to the skillet. Stir for about 30 seconds until fragrant.

3. Add the rest: Add black beans and corn to the skillet. Stir to combine and let everything cook together for 3–5 minutes. Once the squash is done, add it directly into the skillet. Gently toss everything together.

4. Broil: Squeeze fresh lime juice over the skillet and stir. Sprinkle cheddar cheese evenly over the top. Allow skillet to broil for 2-3 minutes in the oven. Gently remove from oven and allow to cool for a minute.

5. Serve: Top with avocado and fresh cilantro. Serve warm as-is, or with tortillas, rice, or chips. Enjoy!

FAQ:

1. Can I make this ahead of time?: Absolutely! I would just add the lime, cheddar cheese, and avocado when you want to enjoy it.

2. Can I make this vegan?: Absolutely. Skip on the cheddar cheese.

3. Is it good for meal prep?: Yes—make a larger batch of the base and portion it out. Store toppings like avocado separately and add just before eating.

4. Can I use other squash: Yes. You can opt for delicata squash or even sweet potato.

5. Is jalapeño necessary?: No, but it does add a slight kick of flavor!

Recipe notes:

• Beans: Canned black beans work great for convenience. Make sure to drain and rinse them well to reduce sodium.

• Corn: Frozen or fresh corn both work—just thaw if using frozen. Fire-roasted corn adds an extra layer of flavor!

• Avocado: Slice right before serving to avoid browning. A little lime juice helps keep it fresh.

• Toppings: Don’t skip the garnishes! A squeeze of lime or a dash of hot sauce adds some extra flavor.

I hope you love this recipe as much as I did, so if you do, please leave me a comment and/or give this recipe a rating! I always read through my suggestions and comments, so please let me know your thoughts. If you have any questions you can feel free to DM me here or through Instagram. Speaking of Instagram - please tag me in all of your creations! I love seeing how the recipes come out and seeing how talented you all are. Sending my love.

xoxo,

Jasmin D the RD