Onion & Spinach Egg Bake

This onion and spinach egg bake is one of those recipes that quietly becomes a staple. It’s simple, comforting, and incredibly versatile — the kind of dish you can make once and enjoy for several meals without getting bored.

I love egg bakes because they take the pressure off. You’re not standing at the stove, you’re not juggling multiple pans, and you end up with something that feels nourishing and complete. This version leans into savory flavors with sweet caramelized onion, fresh herbs, and just enough cheese to make it satisfying without being heavy.

It works just as well for breakfast as it does for lunch or dinner, and it’s a great example of how meals don’t need to be complicated to be supportive.

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Why You’ll Love This Recipe

This egg bake is:

• Easy to prep ahead and reheat
• Made with simple, whole ingredients
• Balanced with protein and healthy fats
• Comforting without feeling overly rich

The combination of eggs, greens, herbs, and cheese creates a dish that’s grounding and satisfying — perfect for busy weeks, slow mornings, or anytime you want something steady and nourishing.

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Ingredients

• 1 dozen whole eggs
• 1 cup raw spinach, roughly chopped
• 1 large sweet yellow onion, thinly sliced into rounds
• ½ cup Pecorino Romano cheese, grated
• ⅓ cup ricotta cheese
• 3 fresh basil leaves, chopped
• 3 fresh sage leaves, finely chopped
• 1 teaspoon fresh rosemary, minced
• ¼ teaspoon kosher sea salt
• ¼ teaspoon black pepper

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Directions

1. Preheat your oven to 375°F and lightly grease a baking dish (9×13 or similar).
2. Spread the sliced onion evenly across the bottom of the dish. Layer the spinach on top of the onions.
3. In a large bowl, whisk the eggs with sea salt and black pepper until well combined. Stir in the Pecorino Romano cheese, ricotta cheese, basil, sage, and rosemary.
4. Pour the egg mixture evenly over the onions and spinach. Gently press the vegetables down so they’re fully submerged in the eggs.
5. Bake uncovered for 35–45 minutes, or until the center is set and the top is lightly golden. Allow to rest for 5–10 minutes before slicing.

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How to Enjoy It

This egg bake can be enjoyed:

• Warm or cold
• As a breakfast option paired with fruit or toast
• For lunch with a simple salad
• As a protein-rich dinner alongside roasted vegetables

It stores well in the refrigerator and reheats beautifully, making it a great option for meal prep.

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A Gentle Nutrition Note

Meals like this help reduce daily stress by removing decision fatigue. When you have something nourishing ready to go, it becomes easier to eat consistently and support steady energy throughout the day.

Eggs provide high-quality protein and fat, while the vegetables and herbs add flavor, micronutrients, and balance. It’s simple food, made to support real life.

A Final Note

Here at Nutrient Rich Life we believe that variety is the spice of life! We encourage everyone to make all foods fit as much as possible and that includes eating more plants and cooking in a way that adds fun and flavor to your life! 

Hi, I’m Amanda!

Functional weight loss coach, registered dietitian nutritionist and mom of one picky eater with multiple food allergies! I’m a big believer that if you can learn to fish — you can eat for life! So this blog is dedicated to helping you learn to toss out the food myths that result in unnecessary food stress so that you can become a confident, healthy eater!