Combine ground beef and taco seasoning in a pan. Stir over medium heat for 5-7 minutes.
Line a baking sheet with parchment. Arrange 2 flour tortillas on top.
Spread about 2 tablespoons of salsa & refried beans onto each tortilla.
Top with ground beef and mozzarella.
Cover with the remaining tortillas.
Top again with salsa, beef, and mozzarella.
Bake for 10 minutes at 350F.
Top with sour cream and spring onions to serve.