Heat up a large frying pan over a medium heat.
Add the olive oil and butter, and allow the butter to melt.
Coat the trout fillets in flour, and shake off the excess flour.
Place the fillets skin up in the frying pan, and fry on both sides for 1-2 minutes until golden - work in batches to fry the rest of the fillets.
Remove the fish from the pan and set aside.
In the same pan, add the peeled and chopped garlic, and fry for 1 minute.
Add the capers, lemon slices, salt, pepper, paprika and give it a good mix.
Pour over the chicken stock, add the parsley, and let it simmer for 2-3 minutes.
Remove the pan from the heat, and drizzle the sauce over the fish fillets.
Serve hot!