Creamy Dijon sauce – ▢3 tablespoons (85 g) Dijon mustard – ▢2 garlic cloves, grated or crushed – ▢1 tablespoon (15 ml) fresh lemon juice, about ½ lemon – ▢½ teaspoon crushed red pepper – ▢2 teaspoons herbs de Provence, or 1 teaspoon each dried tarragon and dried thyme – ▢¾ cup (125 ml) chicken broth – ▢½ cup heavy cream Chicken – ▢6-8 pieces (900 g) bone-in, skin-on chicken thighs, 2½-3 pound – ▢Kosher salt – ▢1 teaspoon freshly cracked black pepper – ▢2 tablespoons (30 ml) extra-virgin olive oil – ▢½ cup chopped onion, about ½ medium onion – ▢2 tablespoons all-purpose flour, or brown rice flour/gluten-free all purpose flour – ▢2 cups kale or spinach, chopped