You will need INSTANT POTWash and chop the strawberries. Sprinkle 1 tablespoon of cake mix over the strawberries, and toss them to coat evenly. Keep it aside.
In a large bowl, combine cake mix, water, oil, and eggs into a smooth cake batter.
Fold in the strawberries into the cake batter.
Take a 7 or 8 inch, cake pan. Grease the pan with some cooking oil.Note: Recipe uses 8 inch, corning ware.
Pour the cake batter into the pan. Cover the pan with some aluminium foil.
Add 1 1/2 cups of water to the inner pot of the Instant Pot. Place a trivet.
With the help of the foil sling, gently lift the cake pan, and place it inside the inner pot. Fold the foil sling over the pan.
Close the Instant Pot lid, vent to sealing. Turn ON Instant Pot to MANUAL / PRESSURE COOK (high), 60 minutes. Followed by 20 minutes, of natural pressure release.
Carefully, lift the pan out using the foil sling. Remove the foil, and let cake cool completely.
Run knife through the edges of the pan, and carefully invert the cake onto a plate.