Bring the gravy to a simmer and allow it to thicken, forming a velvety sauce. Return the browned meatballs to the skillet, nestling them into the mushroom gravy. Cover the skillet and let the ...

Add enough of the meatballs to fit in one layer without crowding, and brown on all sides, 5 to 8 minutes. Craig Lee for The New York Times Add marinara sauce to the pan and bring to a simmer ...