Small crispy bites with au gratin mushrooms

The guests had started to eat from the plate when suddenly I thought that I had forgotten to take photos, they couldn’t wait for me to bring back the appetizers because they loved it and so did I, such an easy treat to make!
Delicious appetizer bites, butter, onions, mushrooms, grated mozzarella… All prepared in a crispy bite, Add all the mixture to the slices of bread.
Guests love the little crispy bites of au gratin mushrooms. An interesting mix for original and delicious crispy bites that can be served as an aperitif, starter or main course…
Absolutely perfect little bites for entertaining guests…. Everyone wants more. And here is a delicious recipe prepared quickly!
So, for the recipe, you need:
Servings: 3-4
Preparation time: 5 min
Cooking time: 18 min
Total time: 23 mins
Ingredients (for 3-4 people):