High Protein Spinach Artichoke Chicken Casserole

My youngest sister actually texted me at 11 PM one Tuesday, asking if I could reinvent her favorite dip into something she could eat for dinner every night without the guilt trip. I had this container of leftover rotisserie chicken staring back at me from the fridge, and suddenly it clicked.

The first time I made this, my apartment building hallway actually smelled like an Italian restaurant. My neighbor knocked on my door with a Tupperware container, practically begging for whatever was bubbling in my oven. That happened three years ago, and now we make this together every Sunday night, trading off who brings the wine.

Ingredients

• 3 cups cooked chicken breast: Rotisserie chickens from the grocery store are my secret weapon here, already perfectly seasoned and tender
• 1 cup Greek yogurt: Plain nonfat works beautifully, but 2% gives you that extra richness nobody will notice
• 4 oz reduced-fat cream cheese: Let it sit on the counter for 30 minutes or your arms will regret the mixing process
• 1 cup shredded mozzarella cheese: Reserve half for the topping because that golden cheese crust is non-negotiable
• 1/2 cup grated Parmesan cheese: The salty, nutty depth here ties everything together
• 2 cups fresh baby spinach: Rough chopping means you get actual bites of green instead of tiny specks
• 1 can artichoke hearts: Drain them well and give them a rough chop, but do not buy the marinated ones
• 1 small yellow onion: Finely diced so nobody gets that surprise crunch in a creamy bite
• 2 cloves garlic: Fresh only, and mince it yourself because the jar stuff tastes wrong
• 1 tsp dried Italian herbs: Whatever blend you have, but add extra oregano if you want it more herb-forward
• 1/2 tsp black pepper: Freshly cracked makes a difference you can actually taste
• 1/4 tsp salt: Start here and adjust after tasting, especially if your chicken was pre-seasoned
• 1/4 tsp crushed red pepper flakes: Totally optional, but I love that background warmth
• Olive oil spray: Keeps things from sticking without adding unnecessary calories
• Fresh parsley: Just a sprinkle on top makes everything look intentional and finished

Instructions

Get your oven ready:

Preheat to 375°F and grab that 9x13 baking dish, giving it a quick spray with olive oil so nothing sticks later

Sauté the aromatics:

Heat olive oil in a large skillet over medium heat, toss in your diced onion for 2 to 3 minutes until it softens, then add garlic for just 30 seconds until you can smell it

Wilt the spinach:

Throw in the chopped spinach and stir for 1 to 2 minutes until it collapses, then remove from heat and let it cool slightly so it does not cook the other ingredients

Make the filling:

In a large bowl, combine chicken, artichokes, the onion-spinach mixture, Greek yogurt, cream cheese, half the mozzarella, all the Parmesan, and your seasonings until everything is evenly distributed

Assemble and top:

Spread the mixture into your prepared dish and scatter the remaining mozzarella across the top like you mean it

Bake until bubbly:

Slide it into the oven for 30 to 35 minutes, checking at the 25-minute mark to make sure the cheese is not getting too dark

The waiting game:

Let it rest for 5 full minutes before serving, or else it will be too hot and too runny

Finish with parsley:

Sprinkle fresh parsley over the top right before serving so it stays bright and pretty

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Last winter during a snowstorm, my neighbor and I ate this straight from the baking dish with spoons while watching movies. That night turned into a weekly tradition, and honestly, some of my favorite memories have happened over a pan of this casserole.

Make It Your Own

Sun-dried tomatoes add this sweet-tart brightness that cuts through all the creaminess, and I always keep a jar in my pantry just for this recipe. Sometimes I swap in part-skim cheddar for the mozzarella when I want something sharper and more pronounced.

Serving Suggestions

A simple arugula salad with lemon vinaigrette balances all that richness perfectly, and the peppery greens are such a smart contrast. Cauliflower rice has become my go-to side because it soaks up all those extra juices without adding heavy carbs to the plate.

Meal Prep Magic

This actually tastes better on day two, after the flavors have had time to really settle into each other. I portion it into glass containers on Sunday and grab one before work, eating it cold some days because the texture holds up beautifully.

• Let it cool completely before covering or you will trap moisture and make it soggy
• Reheat at 350°F for about 15 minutes if you want that freshly baked cheese crust back
• It keeps perfectly in the fridge for three days, maybe four if you are lucky

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There is something genuinely comforting about a dish that tastes indulgent but is actually working pretty hard for your nutrition goals.

Recipe FAQs

→ Can I make this ahead of time?

Yes, assemble the dish up to 24 hours in advance and refrigerate. Bake when ready, adding 5-10 minutes to cooking time if baking cold.

→ What can I substitute for Greek yogurt?

Sour cream or plain dairy-free yogurt work well. For a lighter version, use plain non-fat Greek yogurt as originally specified.

→ How do I store leftovers?

Store in an airtight container in the refrigerator for up to 3 days. Reheat in the microwave or oven at 350°F until warmed through.

→ Can I use frozen spinach instead of fresh?

Yes, thaw and squeeze out excess moisture before adding. Use about 10 oz frozen spinach to equal the 2 cups fresh.

→ Is this freezer-friendly?

Assemble before baking, wrap tightly, and freeze for up to 3 months. Thaw overnight in refrigerator before baking as directed.