Instructions

  1. Whisk together the vinegar, lemon juice, garlic and thyme in a large bowl.
  2. Season with salt and pepper and gradually whisk in the olive oil.
  3. Slice both of the squash diagonally into 1/4" thick slices.
  4. Spoon 3 tablespoons of the marinade into a small bowl, cover and set aside.
  5. Add all the squash to the remaining marinade in the large bowl and toss to coat.
  6. Transfer the mixture to a 13x9 glass baking dish, cover and marinate at room temperature for at least 3 hours.
  7. Can also be refrigerated for up to one day to marinate.
  8. Season squash with a little additional salt and pepper and grill on the barbecue or on an indoor grill pan until they are crisp tender and brown, turning occasionally for about 8 minutes.
  9. Transfer squash to a serving platter and drizzle with the reserved 3 tablespoons of marinade.
  10. Serve hot or at room temperature.