Step 1: Ingredients

For 4 people:

- 1 pork sirloin 400g (7/8 lbs or more if you are hungry)
- 2 big onions (more if you like onions)
- 3 beautiful tomatos (more if you like tomatos)
- mustard from Dijon (nice France city located in Burgundy) but mustard from other location may work too
- 1 table spoon of "herbes de Provence" (a mix of marjoram (oregano) 26%, savory 26%, rosemary 26%, thyme 19% and basil 3%)
- 3cl of olive oil
- salt
- pepper