For best results, choose okra pods that are small to medium in size (about 3-4 inches long). Larger pods can be tougher. Don't overcrowd the grill; grill in batches if necessary to ensure even cooking and good char marks. If you don't have fresh rosemary and thyme, you can substitute dried herbs, but use half the amount (1/8 teaspoon each). A squeeze of lemon zest along with the juice will intensify the citrus flavor. Feel free to experiment with other herbs and spices, such as oregano, basil, or a pinch of red pepper flakes for extra heat.