Summary
Ingredients
Instructions
- Peel the onion, cut into small cubes, sauté in a pan in the oil over medium heat until translucent and leave to cool.
- Stir the butter until creamy, stir in the mustard and onion. Chop the tarragon, stir into the mustard butter and season with salt and pepper.
- Tip:
- Tastes very tasty with fried or grilled steaks.