In a bowl, combine the garlic, parsley, lemon juice, olive oil, Dijon mustard, and whole-grain mustard, and season to taste; whisk until well emulsified.
4 garlic cloves, 2 tbsp. fresh parsley, 2 tbsp. fresh lemon juice, 2 tbsp. Dijon mustard, 2 tbsp. whole-grain mustard, ¼ cup olive oil, Sea salt and freshly ground black pepper