Combine the lukewarm milk, honey, and yeast in a deep bowl. Mix well and let rest 5 minutes.
Add the egg and butter and mix thoroughly, then work in the flour and salt. Knead 10-12 minutes until smooth and cohesive.
Cover and let the dough rise 1 hour in a warm spot until doubled.
Heat the olive oil in a skillet over medium-high. Add the ground beef with the salt, paprika, garlic powder, onion powder, cayenne, and black pepper. Cook 7-8 minutes until browned and cooked through.
Stir in the ketchup and mix well. Cool completely before filling the buns.
Gently deflate the dough and divide into 9 equal balls. Roll each into a flat round.
Place a cheese slice, some meat mixture, and burger sauce in the center (add extra cheese if you like).
Fold the dough edges around the filling and seal tightly to prevent leaks.
Turn seam-side down onto a parchment-lined baking sheet, brush with beaten egg, and sprinkle with sesame seeds. Let rise 30 minutes.
Bake at 200C for 12-18 minutes until golden brown. Makes 9.
Soft buns stuffed with cheesy sloppy-joe beef. From Kookmutsjes on Instagram; full recipe: https://kookmutsjes.com/recept/sloppy-joe-burgers/