Do I need to soak wooden skewers before grilling?
Yes, soak wooden skewers in water for at least 30 minutes to prevent charring and splitting on the grill.
How long should I marinate the vegetables?
Marinate for 30 minutes to 2 hours. Longer marinating adds more flavor, but even 30 minutes is sufficient for tender, flavorful skewers.
How do I know when the vegetables are done grilling?
Vegetables are ready when they have light char marks and are tender when pierced with a fork, typically 10-12 minutes over medium-high heat.
Can I make these skewers ahead of time?
Yes, assemble and marinate the skewers up to 4 hours in advance. Store in the refrigerator and grill just before serving.
What can I substitute for balsamic vinegar?
Red wine vinegar or aged sherry vinegar work well as alternatives, though the flavor will be slightly less sweet.