Stuffed Courgettes with egg and lemon sauce

Ingredients

 * 1 1/2 kilo large courgettes
 * 1/2 kilo minced beef or pork or both
 * 3/4 cup of rice
 * 2 onions
 * 3 tablespoons butter
 * 1 small bunch of dill
 * salt, pepper

Directions

 * 1) Scrape and wash the courgettes.
 * 2) Remove a slice from the small side, empty the courgettes by using a spoon or a special kitchen tool. Mix the mince, the rice, the finely chopped onions and dill in a bowl.
 * 3) Fill the courgettes with the mixture.
 * 4) Put them in a saucepan together with the butter and add enough water to almost cover them.
 * 5) Cook for about 3/4 of an hour.
 * 6) Prepare the avgolemono sauce, pour it over the courgettes and shake the pan gently over low heat until the sauce thickens.