Preheat the Oven: Set to 375°F (190°C) and grease a baking dish.
Prepare the Zucchini: Grate one zucchini, then squeeze out excess moisture. Slice the other zucchini into thin rings.
Whisk the Eggs: In a bowl, beat the eggs, then mix in ricotta cheese, garlic, fresh dill, salt, and black pepper.
Combine Ingredients: Fold in the grated zucchini and mix well.
Assemble the Frittata: Pour the mixture into the prepared baking dish, then arrange the zucchini rings on top.
Bake Until Golden: Bake for 25–30 minutes or until the center is set and the top is slightly golden.
Cool & Serve: Let it cool for a few minutes before slicing. Serve warm or at room temperature.