Russian Pirozhki (Stuffed Buns) | DelishGlobe

Ingredients

• 250 ml warm milk
• 7 g active dry yeast
• 1 tbsp sugar
• 500 g plain flour
• 1 tsp salt
• 1 egg
• 2 tbsp sunflower oil
• 300 g minced beef
• 1 medium onion (finely chopped)
• Salt and pepper to taste
• 1 tbsp butter
• 1 egg yolk (for brushing)
• 1 tbsp water