Step 1: Prepare the Vegetables

1. Grate the zucchini: Start by washing the zucchini and grating them using a box grater. Once grated, place the zucchini in a colander, sprinkle with a little salt, and let it sit for 10-15 minutes. This helps to draw out excess moisture from the zucchini.
2. Squeeze the zucchini: After letting the zucchini sit, use your hands or a clean kitchen towel to squeeze out as much water as possible. Removing the excess water ensures that your frittata isn’t soggy.
3. Chop the other vegetables: Finely chop the red onion, dice the red bell pepper, and grate the carrot. Halve the cherry tomatoes and set them aside for later use.

Step 2: Prepare the Frittata Batter

1. Beat the eggs: In a large mixing bowl, crack the eggs and beat them until they are smooth. Add a pinch of salt, black pepper, and the oregano to the eggs. Whisk the mixture well to incorporate the spices.
2. Mix the dry ingredients: Gradually add the flour to the beaten eggs, whisking continuously to prevent any lumps from forming.
3. Add the vegetables: Stir in the grated zucchini, minced garlic, chopped red onion, diced red bell pepper, and grated carrot. Mix until everything is evenly combined.

Step 3: Cook the Frittata

1. Heat the olive oil: In a large oven-safe skillet or non-stick pan, heat 2 tablespoons of olive oil over medium heat.
2. Sauté the vegetables: Add the vegetable mixture to the skillet and sauté for about 5-7 minutes, stirring occasionally until the vegetables begin to soften and release their flavors.
3. Pour the egg mixture: Once the vegetables are slightly softened, pour the egg mixture evenly over the vegetables in the skillet.
4. Add the ricotta and tomatoes: Using a spoon, place small dollops of ricotta cheese on top of the frittata. Arrange the halved cherry tomatoes evenly across the surface, pressing them gently into the mixture.
5. Cook on the stove: Let the frittata cook on the stovetop for 4-5 minutes until the edges start to set.

Step 4: Finish in the Oven

1. Preheat the oven: While the frittata is cooking on the stove, preheat your oven to 180°C (350°F).
2. Bake the frittata: Transfer the skillet to the preheated oven and bake for 15-20 minutes, or until the frittata is fully set in the center and golden on top.
3. Cool and garnish: Once baked, remove the frittata from the oven and let it cool slightly. Garnish with freshly chopped parsley before serving.