01 -
Preheat the oven to 350°F. Arrange mini filo shells on a baking sheet.
02 -
Melt butter in a skillet over medium heat. Add mushrooms and sauté until tender, about 5 minutes.
03 -
Sprinkle flour over mushrooms and cook for a couple of minutes. Gradually add ¾ cup heavy cream, stirring until smooth.
04 -
Stir in chopped green beans and Parmesan cheese. Cook until the mixture is smooth. Add more cream (up to ¼ cup) if needed for desired consistency.
05 -
Stir in onion powder, salt, and pepper to taste.
06 -
Spoon a generous tablespoon of the green bean mixture into each filo shell. Top with French fried onions.
07 -
Bake for 4-6 minutes, until the onions are golden brown. Serve warm.