Homemade is always better. Just a tip with whole fillets. Often they lack in flavour. Rump being much more flavorsum. So we marinated the fillet chunks with onion pieces. Garlic, mustard, oil of ur choice chilli and some pomogranate reductionfor sweet sticky. Squeeze lemon juice. U can play around. You need the different flavors.  They were delicious and better than eating a whole steak. Even my men said so.

U can do the same with vegetables. Courgettes work well with peppers and onion. Same marinate. Or make it a bit fresher using some herbs like thyme, sage or oregano and a touch of lemon rind.