This looks so easy.
Toss 1 pound thawed frozen lima beans, 2 cups corn, 1 diced red bell pepper, 2 sprigs thyme, 2 tablespoons butter, and salt and pepper on a sheet of foil. Form a packet. Grill over medium-high heat, 10 minutes. Open and stir in 1/4 cup cream. Reseal; grill 10 more minutes. Top with chopped parsley.