Amazing Cheesy Chicken Spaghetti Squash Casserole

Ugh, weeknight dinners, right? We all want something that tastes like a hug but doesn’t pile on the calories or leave us feeling guilty. I was in that exact boat a few weeks ago, staring into the fridge, dreading the “what’s for dinner” question. That’s when I whipped up this Cheesy Chicken Spaghetti Squash Casserole High Protein Healthy Dinner, and let me tell you, it was a game-changer! It’s become

Why You’ll Love This Cheesy Chicken Spaghetti Squash Casserole

Seriously, this recipe is a weeknight hero! It’s so satisfying and tastes like pure comfort food.

• It’s super easy to throw together, even on a crazy busy night.
• Packed with protein (hello, 30g per serving!) to keep you full and happy.
• You get all those yummy cheesy, creamy flavors without all the guilt.
• It’s perfect for making ahead and having healthy dinners ready to go!

Ingredients for Your High Protein Dinner

Okay, getting these ingredients together is the easy part! I love that this recipe uses stuff you can probably already find in your kitchen.

• 1 large spaghetti squash
• 1 pound chicken fillets
• 1 teaspoon Italian seasoning
• 1/2 teaspoon salt
• 1/2 teaspoon black pepper
• 1 cup diced green bell pepper
• 2/3 cup diced tomatoes, drained
• 1 cup plain Greek yogurt
• 1 cup shredded cheddar cheese, divided
• 1/2 cup shredded mozzarella cheese
• 2 cloves garlic, minced
• 2 tablespoons chopped fresh basil

Step-by-Step Instructions for Cheesy Chicken Spaghetti Squash Casserole

Step 1: Fire up that oven to 400°F! Grab your spaghetti squash, slice it right down the middle, and scoop out all those pesky seeds. Put it cut-side down in a baking dish with just a little bit of water – this helps it steam up nicely. While that’s getting ready, season your chicken fillets with the Italian seasoning, salt, and pepper. Pop those in their own little baking dish too. Put both in the oven and let them bake for about 45 to 50 minutes. You’ll know they’re ready when the squash is tender when you poke it with a fork, and the chicken is cooked through (165°F is the magic number!).

Step 2: Once everything is cooked, carefully take them out. Let them cool just enough so you can handle them. Now, for the fun part! Take a fork and scrape the inside of the squash to get those lovely spaghetti-like strands. Shred your cooked chicken with two forks – easy peasy!

Step 3: Turn the oven down to 350°F – we’re just getting ready to get things cheesy and bubbly now. In a big bowl, toss together those spaghetti squash strands, the shredded chicken, diced green bell pepper, drained diced tomatoes, and that lovely plain Greek yogurt. Add about half of your shredded cheddar cheese and the minced garlic, and give it all a good mix until everything is coated. This is where the creamy goodness really starts! Looking for more ideas on how to use Greek yogurt in creamy sauces? Check out these other recipes.

Step 4: Pour this delicious mixture into your casserole dish. Sprinkle the rest of the cheddar cheese and all the mozzarella cheese evenly over the top. Pop it back into the oven for about 15 to 20 minutes. You want it to be heated all the way through, and that cheese should be all melty and a gorgeous golden brown.

Step 5: Once it’s out of the oven and looking perfect, sprinkle on the fresh basil. It adds such a lovely fresh pop of flavor! Now serve it up and enjoy your super healthy, super cheesy dinner.

Serving Suggestions for Your Healthy Dinner

This casserole is amazing on its own, but here are a few things that make it even better:

Simple Mediterranean Salad: A bright, fresh salad with cucumber, tomatoes, and a light vinaigrette cuts through the richness of the casserole. It adds a lovely crispness you’ll really appreciate. You can find some great ideas here!

Air Fryer Cauliflower Bites: If you want a little extra veggie power and a different texture, these crispy cauliflower bites are perfect. They add a great crunch and flavor without being heavy. Try them this way!

Storage and Reheating Tips for Your High Protein Casserole

Leftovers? Yes, please! This casserole is almost as good the next day.

Once cooled, store any extra cheesy chicken spaghetti squash casserole in an airtight container in the fridge for up to 4 days. It’s seriously perfect for meal prep! For reheating, I find the oven works best to bring back that bubbly, cheesy top. Just pop it in a 350°F oven for about 10-15 minutes until heated through. You can also microwave it, but it might not get quite as crispy. Loving the meal prep vibe? You should totally check out these other awesome meal prep bowl ideas!

Frequently Asked Questions about Cheesy Chicken Spaghetti Squash Casserole

Got questions? I’ve got answers! This dish is pretty straightforward, but here are a few things people often ask:

Can I make this Cheesy Chicken Spaghetti Squash Casserole ahead of time?

Absolutely! That’s one of my favorite things about it. You can totally assemble the entire casserole (without topping it with the cheese) and store it covered in the fridge for up to 2 days. Then, just add the cheese and bake when you’re ready. It’s a lifesaver for busy evenings!

What if I don’t have spaghetti squash?

No worries! While spaghetti squash is amazing here for that noodle-like texture and lower carb count, you can definitely swap it out. Zucchini noodles work, or even regular pasta if you’re not strictly low-carb. You could also use another vegetable like cauliflower rice for a different take. For more high-protein casserole inspiration, check out this list!

How can I make this even higher in protein?

Great question! This casserole is already pretty loaded with protein, but if you want to boost it even more, I’d suggest adding a can of drained and rinsed cannellini beans or chickpeas to the mix in Step 3. They blend right in and add extra fiber and protein without changing the flavor too much. Enjoy!

Before You Go

Seriously, give this Cheesy Chicken Spaghetti Squash Casserole High Protein Healthy Dinner a whirl! It’s such a fantastic way to get a delicious, filling meal on the table. If you try it, please let me know what you think in the comments, or even better, give it a star rating! Happy cooking! You can also find more yummy ideas over on Pinterest!

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