1. Whip Plugrá Butter until smooth.
2. Chop fresh herbs and mince garlic.
3. Combine Plugrá Butter, herbs, garlic, mustard, black pepper, and salt with a spatula. Finish by adding lemon juice.
4. Roll into two 1" x 6" logs using parchment paper. Chill for a few hours before use.
5. Transfer to plastic wrap. Can be stored in refrigerator for 3 weeks or in the freezer for up to 3 months.