Remove the lobster from the shell if possible
Place the lobster in a heat-safe dish
Add a small amount of butter, water, or broth to keep it moist
Cover the dish with foil or a lid
Rewarm in a low oven at 275°F to 300°F
Heat for 10 to 15 minutes, checking frequently
Rewarm only until just heated through
Avoid overheating to prevent rubbery texture
Alternatively, steam briefly over low heat for a few minutes
Serve immediately after reheating