Why You’ll Love This Recipe

• Incredibly easy one-bowl recipe.
• Budget-friendly ingredients.
• Perfect for meal prep and lunchboxes.
• A sneaky way to get kids to eat more vegetables.
• Versatile and easily adaptable with different ingredients.
• Creates its own crust, making it ‘impossibly’ simple.

Equipment You’ll Need

• Large mixing bowl
• Box grater
• Whisk or fork
• Knife and cutting board
• 9×13 inch (23×33 cm) baking dish or slice pan
• Spatula

Ingredients

• 3 medium-large zucchinis (about 750g or 1.6 lbs), coarsely grated
• 1 large brown onion, finely chopped
• 1 cup (120g) shredded sharp cheddar cheese
• 1 cup (150g) self-raising flour
• 5 large free-range eggs, lightly beaten
• 1/3 cup (80ml) vegetable or light olive oil
• 1/2 teaspoon salt
• 1/4 teaspoon freshly ground black pepper
• Optional: 1 cup of mix-ins like cooked bacon, corn kernels, or chopped red bell pepper

Instructions

1. Preheat your oven to 350°F (180°C). Grease and line your 9×13 inch baking dish with parchment paper, leaving some overhang to make it easy to lift out later.
2. Place the grated zucchini in a colander or clean kitchen towel. Sprinkle with a little salt and let it sit for 10 minutes. Then, squeeze out as much excess moisture as you possibly can. This step is crucial to prevent a watery slice.
3. In a large mixing bowl, combine the squeezed zucchini, finely chopped onion, shredded cheddar cheese, and self-raising flour. Stir gently to distribute the ingredients evenly.
4. In a separate small bowl, whisk together the lightly beaten eggs, oil, salt, and pepper.
5. Pour the wet egg mixture into the dry zucchini mixture. Stir with a spatula until everything is just combined. Be careful not to overmix; a few lumps are perfectly fine.
6. If you’re using optional add-ins like cooked bacon or corn, fold them in now.
7. Pour the batter into your prepared baking dish and use the spatula to spread it out into an even layer.
8. Bake for 35-40 minutes, or until the slice is golden brown on top and a skewer inserted into the center comes out clean. The slice should be firm to the touch.
9. Allow the zucchini slice to cool in the pan for at least 10 minutes before using the parchment paper overhang to lift it out. This resting time helps it set, ensuring clean, perfect slices.
10. Cut into squares and serve warm or allow to cool completely before storing.

Expert Cooking Tips

• The Squeeze is Key: Do not skip squeezing the water from the zucchini. A watery zucchini will lead to a soggy, sad slice. Squeeze, and then squeeze again!
• Don’t Overmix: Mix the batter only until the ingredients are combined. Overmixing can result in a tougher, denser texture.
• Cheese Choice: A sharp or mature cheddar will give the slice a much richer, more savory flavor than a mild one.
• Check for Doneness: Ovens vary. Start checking at the 30-minute mark. It’s ready when it’s golden and firm in the center.

Substitutions and Variations

This recipe is incredibly forgiving. For a gluten-free version, substitute the self-raising flour with a cup-for-cup gluten-free self-raising flour blend. You can swap cheddar for other cheeses like feta, Gruyère, or a Parmesan blend. Feel free to add other vegetables like grated carrot, corn kernels, or finely chopped bell peppers. For a non-vegetarian version, add 1 cup of chopped, cooked bacon or ham.

Common Mistakes to Avoid

The most common mistake is not removing enough moisture from the grated zucchini, resulting in a watery slice that doesn’t set properly. The second mistake is cutting it while it’s too hot. Letting the slice cool for at least 10 minutes allows it to firm up, preventing it from falling apart when you cut it.

Serving Suggestions

This versatile slice can be a meal in itself. Serve it warm with a crisp green salad and a dollop of tomato chutney or relish for a simple, satisfying dinner. It’s also fantastic served cold, making it a perfect addition to lunchboxes, picnics, or as a party appetizer. It pairs beautifully with a simple soup for a complete ‘soup and slice’ meal.

Storage and Reheating Tips

Store leftovers in an airtight container in the refrigerator for up to 4 days. It’s great for grab-and-go lunches. Zucchini slice also freezes exceptionally well. Cut it into individual portions, wrap each piece tightly in plastic wrap and then a layer of aluminum foil, and freeze for up to 3 months. Thaw overnight in the refrigerator or gently reheat in the microwave or oven.

Frequently Asked Questions

Can I make this dairy-free?

Yes, you can substitute the cheddar cheese with a dairy-free cheese alternative. The texture might be slightly different, but it will still be delicious.

Why did my zucchini slice turn out soggy?

The most likely reason is that too much moisture was left in the zucchini. It’s essential to squeeze out as much water as possible before adding it to the batter. An under-baked slice can also be soggy in the middle, so ensure it’s cooked through.

Can I use regular all-purpose flour instead of self-raising?

Yes, you can. If using all-purpose flour, you’ll need to add a leavening agent. For every 1 cup (150g) of all-purpose flour, add 1.5 teaspoons of baking powder and a 1/4 teaspoon of salt.

Conclusion

The Impossible Zucchini Slice truly lives up to its name, delivering maximum flavor and satisfaction with minimal effort. It’s a testament to the fact that simple, wholesome ingredients can create something truly special. For busy moms, it’s more than just a recipe; it’s a reliable, delicious solution to the daily ‘what’s for dinner?’ dilemma. Give it a try, and watch it become a treasured favorite in your family’s meal rotation.