This baked frittata combines tender zucchini and red pepper with crisp bacon, cheese, eggs, and cream. A gentle bain-marie gives it a soft, custardy center that slices neatly and tastes delicious warm or at room temperature.
Preheat the oven to 300°F / 150°C. Line a 10 ¼ × 4 × 2 ¼-inch (26 × 10 × 5.5 cm) loaf pan with parchment paper.
Heat 3 tbsp extra virgin olive oil in a skillet over medium heat. Add 1 onion, chopped, and ½ tsp salt, then cook until softened. Stir in 1 red pepper, diced, and cook for 1 minute.
Add 600 g zucchini, chopped, and cook until tender. Remove the skillet from the heat and let the vegetables cool completely.
Meanwhile, cook 300 g bacon in a separate skillet until crisp.
Gently whisk 4 eggs with 300 ml cream in a large bowl until smooth. Fold in the cooled vegetables, crisp bacon, 150 g grated cheese, the remaining ½ tsp salt, and ½ tsp pepper.
Pour the mixture into the prepared loaf pan. Set the pan inside a larger pan of hot water to create a bain-marie, then bake for 1 hour, or until the edges are set and the center has a slight jiggle but no visible liquid.
Carefully lift the loaf pan from the water bath and let the frittata rest for 10 minutes. Remove it from the pan, peel away the parchment, and serve warm or at room temperature.
Notes
Cool the Vegetables Fully: I let the zucchini and peppers cool completely so they do not begin cooking the eggs before the frittata goes into the oven. Whisk Gently: Mix the eggs and cream only until smooth. This keeps the baked frittata soft and custardy rather than overly airy. Check the Center: The edges should be set while the center retains a slight jiggle without looking liquid. I use this cue instead of relying only on the baking time. Cut Neat Slices: Let the frittata rest for the full 10 minutes, then slice it with a knife warmed under hot water so it passes cleanly through the soft center.