We tried this last week - from the Good Food website. It was quick to prepare and then you just put it in the oven and leave it alone - I like that!
125g ball mozzarella , torn into small pieces
50g strong cheddar , grated
1 tbsp wholegrain mustard
4 skinless boneless chicken breast fillets
8 smoked streaky bacon rashers
Heat oven to 200C/fan 180C/gas 6. Mix the cheeses and mustard together. Cut a slit into the side of each chicken breast, then stuff with the mustard mixture. Wrap each stuffed chicken breast with 2 bacon rashers - not too tightly, but enough to hold the chicken together. Season, place on a baking sheet and roast for 20-25 mins.
Veggie version: Cheesy baked mushrooms: Heat oven to 180C/fan 160C/gas 4. Mix the mozzarella and cheddar with 1 tbsp pesto, then spoon into the hollows of 4 portobello mushrooms. Place on a baking tray and roast for 15 mins or until the mushrooms are softened and the cheese is bubbling.