In a mixing bowl, whisk together the champagne, olive oil, honey, minced garlic, and dried lavender.
Season the rib-eye steaks with salt and pepper, then place them in a large ziploc bag.
Pour the marinade over the steaks in the bag, making sure they are fully covered. Close the bag and place it in the refrigerator to marinate for at least 2 hours, turning the bag occasionally to evenly coat the steaks.
Preheat your grill to high heat.
Remove the steaks from the marinade and discard the excess. Let the steaks rest at room temperature for 20 minutes.
Grill the steaks for about 4-5 minutes per side, or until they reach your desired level of doneness. Use a meat thermometer to check for an internal temperature of 135°F for medium-rare, 145°F for medium, or 160°F for well-done.
Once done, remove the steaks from the grill and let them rest for 5 minutes before serving.
Serve the grilled rib-eye steaks with your choice of sides and enjoy the delicious flavors of champagne and lavender.