Pre-heat oven to 400.
Heat a medium oven-proof saute pan over medium-high heat and add oil. Lightly salt and pepper fillets and cook one side over medium heat about 4 min or until seared. Transfer to oven and cook 5-10 min until done depending on thickness of fillets.
Meanwhile melt butter in a small sauce pan or skillet over medium-low heat. Add miso, lemon juice and honey and stir until blended, reduce heat to low and cook sauce for 5 minutes. Add pepper, cream if desired and chopped cilantro. Serve over fish, garnish with additional cilantro leaves and lemon wedges.