In a bowl, whisk together honey, dried lavender, olive oil, mustard, garlic, lemon zest, and juice. Season with salt and pepper.
Marinate the chicken breasts in the mixture for 1-2 hours.
Preheat grill to medium-high heat.
Grill chicken for 5-7 minutes per side, until fully cooked.
Let the chicken rest for 5 minutes before serving. Garnish with a sprinkle of lavender and lemon slices.