
Quick and easy Spanish omelet using leftover vegetables!
Do you have a few stray vegetables or a single potato left in your refrigerator? This Spanish-style omelet is the ultimate solution for “organizing” your fridge while creating a colorful, café-worthy breakfast.
By simply mixing diced fish sausage and vegetables, you can create a thick, satisfying dish that is perfect for busy mornings or as a high-protein meal for growing children.
Why This Recipe Works
- The “Refrigerator Lifesaver”: While traditional Spanish tortillas focus on potatoes, home cooking is about flexibility. You can substitute ingredients with whatever you have on hand—chicken, bacon, tomatoes, or even seasonal Japanese root vegetables like taro (satoimo) or lotus root (renkon).
- One-Dish Nutrition: This recipe provides a balanced profile of carbohydrates (potatoes), high-quality protein (eggs and fish sausage), and essential vitamins.
- Antioxidant Boost: Using colorful bell peppers adds a vibrant aesthetic and a healthy dose of antioxidants to start your day.
- Effortless Baking: Oven-baking eliminates the need to stand over a stove flipping a heavy pan. Simply mix, pour, and bake.
Nutrition Facts (Per Serving)
Calculated for two gratin dishes
- Calories: 558 kcal
- Protein: 36.9 g
- Fat: 32.4 g
- Carbohydrates: 35.3 g
- Salt Equivalent: 5.0 g
Ingredients
Yields two gratin dishes (approx. 400ml capacity each)
- Garlic: 4g (minced)
- Potato: 60g
- Bell Peppers (Red/Yellow): 60g
- Onion: 60g
- Fish Sausage: 60g
- Eggs: 4 large
- Milk: 60g
- Consommé Granules: 6g
- Cheese: 6g (Grated Parmesan or 1 slice of processed cheese)

Step-by-Step Instructions
- Prep the Vegetables: Chop the garlic finely. Peel the potatoes and onions. Remove seeds from the peppers.
- The “1.5cm Rule”: Cut the potatoes, peppers, onions, and fish sausage into uniform 1.5cm cubes. This ensures everything cooks evenly and provides a satisfying texture.
- Prepare the Base: In a large bowl, beat the eggs and whisk in the milk. Add the consommé granules and cheese. (If using sliced cheese, tear it into small pieces first).
- Combine: Fold the diced ingredients and garlic into the egg mixture until well combined.
- Fill the Mold: Pour the mixture into your heat-resistant gratin dishes. Note: The omelet will rise as it cooks, so fill the molds to about 80% capacity to prevent overflow.
- Bake: Place in an oven preheated to 230°C (445°F). Bake on the middle rack for 20 minutes.
- Tip: If the top browns too quickly, cover loosely with aluminum foil.
- Check for Doneness: Poke the center with a fork or chopstick. If liquid egg leaks out, extend the baking time by 5–10 minutes.
Today’s Menu Suggestion

For a complete, stylish breakfast spread, serve your Spanish Omelette with:
- Warm bread rolls
- A crisp chopped salad (utilizing any leftover omelet veggies and lettuce)
- Yogurt topped with granola and fresh figs
Watch the technique here: Oven Baked Spanish Omelette Tutorial
📖Read the Japanese version of this article here! [冷蔵庫の余り物が大変身!「彩りスパニッシュオムレツ」の簡単オーブンレシピ]

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