Wash the zucchini. If it is old, remove the skin and seeds. There is no need to peel young zucchini, just remove the stem. Wash the dill with cold water and dry on a paper towel. Grate the cheese on a coarse grater.
Grate the prepared zucchini on a coarse grater, add salt and mix. Leave for 5 minutes, drain in a colander to drain the liquid. Transfer to a bowl. Add eggs and semolina. Leave for 5 minutes so that the semolina swells slightly.
Cut the cheese into medium-sized cubes, up to 2 cm. Cut the garlic into small cubes. Finely chop the prepared dill with a sharp knife. Combine the two prepared mixtures and mix thoroughly.
Grease a dry baking dish with vegetable oil and sprinkle with semolina. Lay out the zucchini dough and spread it evenly, leveling the surface. Mix ketchup and sour cream, place this mixture on top of the dough. Sprinkle grated cheese on top.
Place the pan in an oven preheated to 160°C and bake at this temperature for 30 minutes. The cheese should brown slightly. After turning off the oven, leave the casserole for another ten minutes. During this time it will not have time to cool, but the texture will become denser and easier to cut.
Serve your casserole hot as a hot appetizer. When serving portions, serve triangular slices on a colorful plate, garnished with a sprig of fresh dill.