Reach Cooking Skill Level 10
Reach Gourmet Cooking Skill Level 10
Reach Fishing Skill Level 10
Reach Gardening Skill Level 10
Buy or harvest 1 Death Flower
Buy or harvest 1 Angelfish
Buy or harvest 1 Potion of Youth from the Rewards Store
Use a stove or grill
Select Gourmet Cooking
Choose Ambrosia
Have all ingredients in the Sim’s inventory
Cook the Ambrosia
Serve and eat it to restore a Sim’s life stage or revive a ghost Sim