Simple Perfect Vinaigrette

• 4 tablespoons olive oil
• 2 tablespoons red wine vinegar or lemon juice (or one of each)
• 1/2 tablespoon dijon mustard
• 1/4 teaspoon salt
• Freshly cracked pepper, to taste
• Optional:
  • 1 teaspoon maple syrup or honey
  • 1 clove garlic (if using garlic, omit maple syrup or honey
  • 2 tablespoons grated Parmesan