Shishitos are a mild peppers, though one in ten is supposedly full of spice! Readily available at most grocery stores, you can often find them at Asian grocers, as well.
Melt butter in a large Good Cook skillet over medium high heat. Toss peppers in butter and cook until peppers begin to blister and turn golden (about 5-7 minutes). Stir every minute or so to keep the butter from burning. Remove from heat, drizzle with lemon juice and toss with zest. Transfer to a serving platter, sprinkle with cheese. Serve immediately and enjoy.