Here is my recipe for lentils, modified for this last New Year’s Eve:

Ingredients:
1 whole golden onion
300g lentils
1/4 yellow pepper
1 whole carrot
50g butter
3 spoonful of olive oil
200ml tomato sauce
a pinch of sugar
salt and pepper
a stock cube (knorr - original)

How to prepare:
Finely chopp the onion, carrot and pepper. Put in a frying pan with the oil and butter. Add the lentils almost straight away. Let the whole lot fry for a couple of minutes and then add the tomato sauce, the pinch of salt and the stock cube. When it starts simmering add the seasoning to taste. Cook for 30 min or as long as the lentils require (depending on the quality, so check the package).