A plated serving of zucchini casserole with ground beef, tomatoes, green olives, onion, and Parmesan beside Cheesy French Bread and a simple salad.

Zucchini Casserole

Drain the zucchini well so the beef-and-tomato filling bakes up hearty rather than watery. The Parmesan browns across the top, with green olives adding a surprising salty bite underneath.

This Zucchini Casserole turns a generous pile of zucchini into a family-style supper with seasoned beef, tomatoes, green olives, herbs, and Parmesan. The filling stays hearty without burying the zucchini, making it especially good with Cheesy French Bread or a simple salad.

Betty Lou Gardner in a family archival photograph

Granny’s Kitchen Notes

From Betty Lou Gardner

I drain the zucchini really well because a watery casserole never bakes up right. Sometimes I add mozzarella over the top, too—the browned cheese around the edges is hard to resist when it comes out bubbling hot.

How to Make Zucchini Casserole

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Zucchini half-moons steaming in a large metal steamer basket.
01

Steam and Drain the Zucchini

Steam the zucchini only until crisp-tender, then give it time to drain thoroughly so the casserole does not become watery.

Ground beef, onion, green pepper, tomatoes, tomato paste, and dried herbs cooking in a large skillet.
02

Cook the Beef Filling

Brown the beef with onion, green pepper, and garlic. Add the tomatoes, tomato paste, and herbs, then simmer until the filling is thick.

Tomato-beef filling being spooned over a layer of steamed zucchini in a casserole dish.
03

Layer the Casserole

Alternate the drained zucchini and tomato-beef filling in a prepared casserole dish.

Unbaked zucchini casserole topped with sliced green olives, onion, and grated Parmesan.
04

Top and Bake

Finish with green olives, thin onion slices, and Parmesan, then bake until bubbling and lightly browned.

A plated serving of zucchini casserole with ground beef, tomatoes, green olives, onion, and Parmesan beside Cheesy French Bread and a simple salad.

Zucchini Casserole

Drain the zucchini well so the beef-and-tomato filling bakes up hearty rather than watery. The Parmesan browns across the top, with green olives adding a surprising salty bite underneath.

By Betty Lou Gardner

Prep15 minCook55 minTotal1 hr 20 minDifficultyEasy
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Ingredients

Scale

Scaling note: Scaling is withheld until recipe-specific quantities, method safety, and instruction synchronization are verified.

Zucchini Casserole

Seasonings

Topping

Optional Additions

Instructions

  1. 6 zucchini, nonstick cooking spray
  2. 1 tbsp olive oil, ¼ cup yellow onion, ⅓ cup green bell pepper, 1 garlic clove, ¾ lb ground beef, ¾ tsp salt
  3. 28 oz San Marzano tomatoes, ½ of a 6-oz can tomato paste, ½ tsp oregano, ½ tsp basil, black pepper, 1 large egg, ½ cup breadcrumbs
  4. drained zucchini, meat mixture, ½ cup green olives, ½ cup yellow onion, ⅓ cup Parmesan cheese

Nutrition (Approximate Per Serving)

Yield

8 servings — Serving size: About 1 generous scoop

Some ingredients could not be modeled and may meaningfully change the totals. Treat these values as a rough estimate.

Calories
220
Carbohydrates
13 g
Protein
11.5 g
Fat
14 g
Saturated Fat
4.5 g
Cholesterol
60 mg
Sodium
630 mg
Fiber
3.5 g
Total Sugars
5 g

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