Heat 4 tablespoons of the butter in a large skillet over medium heat until it bubbles and the milk solids begin to brown, swirling the pan occasionally.
Add the ravioli in a single layer (use thawed ravioli if frozen) and cook until golden on the first side, about 2 to 3 minutes.
Flip the ravioli and cook the second side until very golden and crisp, another 2 to 3 minutes.
Pour 1/3 cup water into the pan and cover immediately; steam the ravioli for 5 to 8 minutes, until tender.
Remove the lid, toss the ravioli gently, then add the remaining 2 tablespoons of butter to the skillet and let it melt and brown briefly.
Season with freshly cracked black pepper and salt if desired, then top with dollops of ricotta, the grated lemon zest, and microgreens or fresh herbs.
Serve immediately while hot and crisp.