Melt 1/2 stick (4 tablespoons) of the butter and brush two 12-cup muffin tins with it. Put the frozen rolls in the cups of the muffin tins. Cover and allow to rise for several hours at room temperature or in the fridge overnight.
Melt the remaining 3 1/2 sticks butter in a skillet over medium-low heat. Mix in the rosemary, thyme and lemon zest and heat until warmed through. Lightly brush the risen rolls with the butter mixture.
Bake the rolls according to the package directions (usually 400 degrees F for 6 to 8 minutes), until the rolls are a deep golden brown on top. Dab with more of the butter mixture and serve warm.