Line the pan with parchment paper, leaving some overhang on the sides for easy removal.

Step 2: Cook the Onion

Heat 2 tablespoons olive oil in a frying pan over medium heat.

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Add the diced onion.

Cook for 5–6 minutes, stirring occasionally, until soft and lightly golden.

Remove from the heat and allow it to cool while preparing the remaining ingredients.

Step 3: Prepare the Vegetables

Wash all vegetables thoroughly.

Grate the zucchini using the coarse side of a grater.

Place the grated zucchini into a clean kitchen towel or cheesecloth and squeeze out as much moisture as possible.

This important step prevents the slice from becoming watery.

Finely chop the broccoli into small bite-sized pieces.

Roughly chop the spinach.

Mince the garlic.

No need to thaw the frozen peas.

Step 4: Make the Batter

In a large bowl whisk together:

• Eggs
• Dijon mustard
• Salt
• Black pepper

Whisk until smooth.

Gradually add the flour while continuing to whisk.

Mix until a thick batter forms with no lumps.

Stir in:

• Cottage cheese
• Grated cheddar cheese

Mix until evenly combined.

Step 5: Add the Vegetables

Fold the following ingredients into the batter:

• Cooked onion
• Garlic
• Grated zucchini
• Broccoli
• Spinach
• Frozen peas

Add the remaining olive oil.

Stir gently until every vegetable is coated in the batter.

Although the mixture contains plenty of vegetables, everything will bake together beautifully.

Step 6: Bake

Pour the mixture into the prepared baking dish.

Spread it evenly using the back of a spoon or spatula.

Bake for 35 minutes, or until the top becomes golden brown and the center feels firm.

Insert a knife into the center.

If it comes out clean, the zucchini slice is fully cooked.

For an even crispier top, place the dish under the broiler for 2–3 minutes.

Watch carefully to prevent burning.

Step 7: Cool and Slice

Remove from the oven.

Allow the zucchini slice to cool for 5–10 minutes.

Lift it out of the pan using the parchment paper.

Transfer to a cutting board.

Slice into 12 equal portions.

Serve warm or at room temperature.

Why These Ingredients Work

Every ingredient contributes something important to the finished dish.

Zucchini

Zucchini provides moisture, tenderness, and a mild flavor that blends perfectly into the egg mixture.

Broccoli

Broccoli adds texture and slightly crisp bites while increasing the vegetable content.

Spinach

Spinach wilts during baking and spreads evenly throughout every slice.

Frozen Peas

Peas add natural sweetness and bright pops of color.

Eggs

Eggs bind all the ingredients together while creating a light, fluffy texture.

Cottage Cheese

Cottage cheese keeps the slice soft, creamy, and high in protein.

Cheddar Cheese

Cheddar melts throughout the bake, adding richness without overpowering the vegetables.

Dijon Mustard

Only a small amount is needed to deepen the savory flavor.

Tips for Perfect Results

1. Remove Excess Moisture

Always squeeze the zucchini thoroughly before mixing it into the batter.

2. Cook the Onion

Softened onions add much more sweetness and flavor than raw onions.

3. Chop Vegetables Evenly

Uniform vegetable pieces cook more evenly.

4. Don’t Overmix

Fold the vegetables gently into the batter.

Overmixing can make the texture heavier.

5. Let It Rest

Cooling for several minutes before slicing helps everything hold together.

Delicious Variations

This recipe is very flexible.

Add Feta Cheese

Replace half the cheddar with crumbled feta for a Mediterranean flavor.

Add Herbs

Fresh parsley, basil, dill, or chives brighten the flavor.

Make It Spicy

Add crushed red pepper flakes or chopped jalapeños.

Extra Protein

Mix in cooked shredded chicken or diced turkey.

Different Vegetables

Try grated carrots, corn, mushrooms, bell peppers, or cauliflower.

Gluten-Free Version

Replace the flour with your favorite gluten-free self-rising flour blend.

Serving Suggestions

Healthy zucchini slice pairs well with many dishes.

Serve it with:

• Green salad
• Tomato salad
• Roasted potatoes
• Vegetable soup
• Grilled chicken
• Fresh fruit
• Toast
• Avocado slices
• Greek yogurt
• Sour cream

It also makes an excellent addition to picnic baskets and lunchboxes.

Storage Instructions

Allow the slice to cool completely before storing.

Place portions into an airtight container.

Refrigerate for up to 4 days.

Separate layers with parchment paper if stacking.

Freezing Instructions

Wrap individual slices tightly in plastic wrap or foil.

Store in freezer-safe containers.

Freeze for up to 3 months.

Thaw overnight in the refrigerator before reheating.

Reheating

Reheat in a 350°F (175°C) oven for 10 minutes.

Alternatively, warm individual slices in a skillet over medium heat.

Microwaving works as well, although the edges will be softer.

Nutritional Information (Per Slice)

Approximate values

• Calories: 175
• Protein: 11 g
• Carbohydrates: 10 g
• Fat: 10 g
• Saturated Fat: 3 g
• Fiber: 2 g
• Sugar: 2 g
• Sodium: 330 mg

Nutritional values are estimates and may vary depending on ingredient brands.

Frequently Asked Questions

Can I prepare this ahead of time?

Yes. This recipe is perfect for meal prep and tastes just as good the following day.

Do I need to peel the zucchini?

No. The skin becomes tender during baking and provides extra color and nutrients.

Can I use frozen spinach?

Yes. Thaw it completely and squeeze out as much moisture as possible before using.

Can I substitute cottage cheese?

Yes. Ricotta cheese works well and creates a similarly creamy texture.

Why is my zucchini slice watery?

Most often this happens because the grated zucchini wasn’t squeezed dry before mixing.

Can I serve it cold?

Absolutely. Many people enjoy zucchini slice chilled straight from the refrigerator.