Instructions:
- Preheat a grill to medium-high heat (about 400 – 425 degrees F).
- Cut 4 sheets of 14 by 12-inch heavy-duty aluminum foil, then lay each piece separately on the countertop.
- Divide the shrimp among the foil packets near the center, then place the asparagus to one side of the shrimp (going the long direction of the foil).
- Pour 1/2 tbsp white wine over each packet. Sprinkle over garlic (1 tsp per packet) and lemon zest, then season with salt and pepper.
- Divide the butter pieces evenly among the packets, layering them over the shrimp and asparagus.
- Wrap the packets in and crimp the edges together, then wrap the ends up (don’t wrap too tight – keep a little extra space inside for heat to circulate).
- Grill, sealed side upward, until the shrimp has cooked through, about 9 – 10 minutes.
- Carefully unwrap the packets, then drizzle with lemon juice (or just serve with lemon wedges for spritzing) and sprinkle with parsley.