Put the feta in a bowl, pour lemon juice over it and then mash it with a fork.
Halve the avocado, carefully remove the stone, cut the pulp crosswise and then remove the pulp with a teaspoon and add to the feta. Mash everything again with a fork and mix until a creamy mass is formed. Mix in the chervil, pepper and chilli.
I like to eat this dip with sweet potato and potato slices that I had in the oven for 20 minutes at 200 ° C.