Pulled Welsh Beef enchilada pie

Ingredients

• 150g leftover pulled PGI Welsh Beef brisket or leftover beef joint, thinly sliced
• 4-5 medium flour tortillas
• 1 tbsp oil
• 1 red pepper, thinly sliced
• 1 yellow pepper, thinly sliced
• 1 red onion, sliced
• 2 garlic cloves, peeled and crushed
• 2 tbsp fajita spice seasoning
• 250g passata
• 1 small can of refried beans
• 150g cheese, grated (keep 100g for the top layer)