Add the fillets and let them boil for 10 minutes in 1L of boiling water.
Remove the water from the fillets by draining them very well in a colander.
Put the fillets, after they have cooled and you can touch them, in a bowl.
Add the salt, pepper, garlic powder, onion powder, curry, mustard, smoked paprika, soy sauce and 1 tbsp of olive oil and mix very well so that they spread evenly on all the fillets.
Leave them aside for 15 minutes.
Then, chop the onions (dry and fresh) and the garlic.
Put the remaining 3 tbsp of olive oil in a pan and we add the onion. We fry it for 5 minutes.
About 1 minute before finishing the frying, add the garlic and stir.
Lower the heat to medium and add the fillets, making sure to turn them on both sides. Fry them for 5 minutes.
Quench with white wine.
Then, add 500ml hot water and the corn flour.
Stir and leave them for another 40 minutes with the lid closed over medium heat until they bind.
Serve with thyme and enjoy!