1. Prepare the Mixing Glass: Start by selecting a mixing glass, which is traditionally used for stirring cocktails. This glass allows for precise mixing and chilling without excessive dilution.

2. Combine the Ingredients: Carefully pour 45 ml of Nor'easter Single Malt Whisky, 20 ml of Red Vermouth, and 20 ml of Campari into the mixing glass. These three ingredients will create a delightful balance of flavors, with the whisky providing a rich base, the vermouth adding sweetness, and the Campari contributing a bitter and herbal note.

3. Add Ice: Place ice cubes into the mixing glass, enough to chill the mixture without over-diluting it. Stirring the cocktail with ice will also help blend the ingredients and achieve the ideal temperature.

4. Stir Well: Using a long bar spoon, gently stir the cocktail for about 20-30 seconds. Stirring allows the spirits and other ingredients to meld together while maintaining the cocktail's clarity and texture.

5. Strain into a Coupe Glass: Once the cocktail is properly stirred and chilled, strain it into a coupe glass. The coupe glass, with its elegant, wide bowl, is perfect for showcasing the Boulevardier's complex flavours.

6. Garnish with Orange Zest: To finish, take a fresh orange and use a zester or a fine grater to create a thin orange zest garnish. Express the oils from the zest over the surface of the cocktail by giving it a gentle twist. This adds a burst of citrus aroma and brightens the drink's profile.

7. Serve and Enjoy: Your Boulevardier is now ready to be enjoyed. The combination of Nor'easter Single Malt Whisky, Red Vermouth, and Campari, highlighted by the orange zest garnish, creates a balanced and sophisticated cocktail with a complex flavour profile.