Prepare the Zucchini: Grate the zucchini and sprinkle with salt. Let it sit for 15 minutes to draw out moisture. Squeeze out the excess water.

Mix Fritter Ingredients: In a large bowl, combine the grated zucchini, chopped onion, grated carrot, minced garlic, chopped dill, grated cheese, eggs, sour cream, and flour. Season with salt and pepper to taste. Stir until well mixed.

Fry the Fritters: Heat sunflower oil in a frying pan over medium heat. Spoon the zucchini mixture into the pan, flattening to form fritters. Fry each side until golden brown and cooked through. Remove and drain on paper towels.

Make the Tomato Sauce: In a saucepan over medium heat, cook the diced tomatoes and minced garlic. Add the tomato paste and season with salt and pepper. Let the sauce simmer for 5-7 minutes until it thickens slightly.

Serve: Serve the warm zucchini fritters topped with the homemade tomato sauce.