Air-Fryer Ground Beef Wellington | Reader's Digest Canada

Ingredients

• 1 tbsp butter
• 1/2 cup chopped fresh mushrooms
• 2 tsp all-purpose flour
• 1/4 tsp pepper (divided)
• 1/2 cup half-and-half cream
• 1 large egg yolk
• 2 tbsp finely chopped onion
• 1/4 tsp salt
• 1/2 lb ground beef
• 1 tube refrigerated crescent rolls (4 ounces)
• 1 large egg (lightly beaten, optional)
• 1 tsp dried parsley flakes