Cheesy Veggie Casserole

Category: Delicious Main Course Recipes for Every Occasion

Homemade veggie casserole with zucchini, onions, and Italian cheeses. No mixes or shortcuts here.
Mena
Updated on Wed, 21 May 2025 14:16:53 GMT
Golden-brown zucchini on a plate with creamy inside layers. Save
Golden-brown zucchini on a plate with creamy inside layers. | delishdocket.com

Every summer my zucchini patch goes wild and this gooey, cheesy bake is the first thing I want to whip up. Pecorino Romano and Parmesan together are a flavor bomb and totally bring back lazy Sundays at grandma's. It's my go-to for everything from brunch gatherings to cozy dinners.

Cherished Favorite of Mine

My mom used to fix this in her kitchen for every holiday get together. Over time, I pumped up the cheese and switched up how she did it just a little. Now this is the most asked-for thing at all our family hangouts.

Our Family's Clever Twist

Pecorino Romano is the secret touch here. Mom figured that out years ago and it changed the whole thing. That punchy salty cheese really keeps people coming back for more, and everyone always wonders what it is.

Only Real Goodness Here

Pass up those boxed shortcuts. Trust me, spending a couple extra minutes measuring flour and baking powder is worth it. The taste is fresher, the texture can't be beat, and you won't ever want the store-bought stuff again.

Slicing It Just Right

If your zucchini rounds are nice and even, everything bakes up so well. I use my mandoline for super thin, even pieces, but a sharp knife is totally fine too. The trick? Press those slices dry with paper towels—it's the best way to keep your casserole from going mushy.

A wedge of golden cheesy zucchini bake with herbs on top, sitting on a white plate and a red cloth nearby. Save
A wedge of golden cheesy zucchini bake with herbs on top, sitting on a white plate and a red cloth nearby. | delishdocket.com

Grab These From Your Kitchen

The fun part with this dish is how plain things turn out so tasty. Zucchini, onions, garlic for that fresh kick, and two different cheeses for deep flavor. A dash of olive oil plus dried basil thrown in makes it all taste like summer.

Mixing It Up

I love dumping everything into a big bowl at once. Make sure to pull apart any zucchini that sticks together so every bite has both veggies and melted cheese. If the batter seems dense, don't sweat it—it bakes up soft and perfect.

Bake and Smell the Joy

When it's in the oven, your whole place smells amazing. Watch for that bubbly golden top and crispy edges. That means it's done! I usually snag an edge piece while it's cooling—I can't help myself.

Kitchen Wisdom From Lots of Bakes

I've made this so many times and picked up some tricks along the way. Weighing your zucchini makes everything just right. Garden zucchinis? Go for the ones in the middle, not the huge ones—they can taste bitter! Don't skip drying those slices, it's totally worth the small effort.

Tasty Partners

It goes with everything. We have it with grilled chicken for a quick dinner, next to a crisp salad for lunch, and even on the holiday table with turkey. Leftovers? Awesome warmed up with eggs the next morning.

Cheesy zucchini layers melted and bubbly in a glass baking dish ready to slice. Save
Cheesy zucchini layers melted and bubbly in a glass baking dish ready to slice. | delishdocket.com

Fits Any Occasion

I've brought this to fancy brunches, easy-going picnics, you name it. There's never anything left and you can make it the night before—it takes the stress out of cooking for a crowd.

Switch Things Up

Every now and then, I toss in roasted mushrooms or colorful peppers for a change. My sister swaps in Fontina sometimes. However you want to play with it, this dish always turns out great.

Tastes Even Better Tomorrow

Little tip: the flavors really get even better by the next day. Extra time in the fridge lets everything blend. I usually bake it ahead on purpose and reheat to bring back the crispiness.

Tasty and Good For You

This is my sneaky way to get more veggies on the table! So much cheese makes everyone love it no matter what, and you still get all that zucchini goodness. It's a yummy and healthy win.

Pairs Well With a Glass

Nothing beats enjoying this with a chilled glass of white wine. Try Pinot Grigio or Sauvignon Blanc—they cut through the cheesy richness perfectly so every bite tastes bright and fresh.

A cheesy slice of zucchini casserole with herbs on a fancy plate and a fork by the side. Save
A cheesy slice of zucchini casserole with herbs on a fancy plate and a fork by the side. | delishdocket.com

Nobody Can Resist

This wins over even the biggest zucchini haters. The cheesy topping and tender inside always get everybody on board. People always want the instructions so I make extra copies every time.

Easy Gluten Free Swap

You can totally make this gluten free for your friends. Just grab any cup-for-cup gluten free flour. I've tried lots, and they've all worked. Honestly, nobody ever notices the switch.

Just One Bowl to Wash

One big plus is hardly any dishes! One mixing bowl and your baking pan—that's it. You get more chill time and less scrubbing after.

Freeze Some For Later

When the zucchini are out of control, I bake extras and freeze them in slices. Wrap them up tight and tuck in the freezer. On a busy night, just pull one out and you've got summer in minutes—even after a couple months they taste great.

So Much More Than Dinner

At this point, this zucchini bake is part of all my best memories—brunching with friends, summer BBQs, special holidays. Every time I make it, I think of my mom and how much love she stirred in.

A slice of zucchini egg bake with parsley on a white plate, looking fresh and inviting. Save
A slice of zucchini egg bake with parsley on a white plate, looking fresh and inviting. | delishdocket.com

Recipe FAQs

→ Why do I need to dry zucchini?
Too much water can make the dish soggy, so drying keeps it perfect.
→ Can I make a smaller batch?
Yes, use half of everything and bake it in a smaller 8x8 dish, same time.
→ What’s the ideal zucchini size?
Go for medium ones with no big seeds to avoid bitterness.
→ How long will leftovers last?
Keep it refrigerated, and it's good for up to five days.
→ Why let the dish cool down first?
Gives it time to set so slices stay together better.

Cheesy Veggie Casserole

Fresh zucchini, sautéed onions, and a cheesy blend of Parmesan and Romano, layered into an easy homemade dish.

Prep Time
25 min
Cook Time
60 min
Total Time
85 min
By: Mena

Category: Main Dishes

Skill Level: Intermediate

Cuisine: American-Italian

Yield: 12 Servings (1 glass pan, 9x13 size)

Dietary Preferences: Vegetarian

Ingredients

01 1½ lbs of zucchini.
02 1 small onion, white variety.
03 2 garlic cloves.
04 Half a cup of olive oil.
05 4 large eggs.
06 1 cup of all-purpose flour.
07 4 teaspoons of baking powder.
08 ½ cup Parmesan, grated.
09 ½ cup Romano, finely grated.
10 Salt, ½ teaspoon.
11 Pepper, ½ teaspoon.
12 ¼ teaspoon dried basil.
13 Butter to coat the pan.

Steps

Step 01

Set your oven to 375°F. Cut zucchini into 1/8-inch slices and blot them dry.

Step 02

Stir together zucchini, garlic, and onion. Whisk oil with eggs, pour it over the veggie mix.

Step 03

Add flour, baking powder, cheeses, and the seasonings to the mixture.

Step 04

Spread into a 9x13 pan greased with butter. Bake for 55-60 minutes until the top is nicely browned.

Notes

  1. Make sure to use a scale for zucchini.
  2. Skip overly large, seedy zucchini.
  3. Let it sit for 5 minutes before cutting.

Required Tools

  • 9x13 dish made of glass.
  • A mandoline slicer or food processor.

Allergy Information

Check every ingredient for allergens and consult a healthcare professional if unsure.
  • Contains dairy.
  • Contains eggs.
  • Contains wheat.

Nutritional Information (per serving)

These details are for informational purposes and don't replace professional medical advice.
  • Calories: 188
  • Fats: 13 g
  • Carbs: 11 g
  • Proteins: 6 g