4: Melt 20 g butter in a small frying pan on medium heat, then add the chopped shallot. Cook for 1 minute without colouring, then set aside.
5: Cut 50 g smoked ham into small pieces.
6: Lightly fry in the same pan as used for the shallot. Set aside.
7: Peel 50 g button or field mushrooms and dice very small.
8: Still using the same pan, heat 1 tablespoon olive oil. When hot, add the diced mushrooms. Cook for 1 minute without colouring. Set aside.
9: Peel and chop 1 garlic clove very finely. Put in a bowl.
10: Add the chopped parsley, shallots, ham, mushroms, 30 g ground almonds and 1 tablespoon Mustard.
11: Mix well, salt and pepper.
12: Soften the butter by stirring for a few minutes with a spatula or fork.
13: Add to the mixture in the bowl and mix together.
14: Your beurre d'escargot is ready for use on a batch of snails. You can also prepare it to use later by transferring it into a forcing bag.
15: Pipe butter "sausages" on a sheet of plastic film.
16: Then roll up the butter in the film to make as even a cylinder as possible and twist the ends to seal.
17: Make as many rolls as you can and freeze them. Your beurre d'escargot can be used later, either for snails or in another recipe: just take out a roll and cut off pieces as you need them.
Remarks
No difficulty with mushrooms, use use what you got.