I've got ... egg.
an egg
I've got ... apple.
an apple
I've got ... coffee.
some coffee
I've got ... orange.
an orange
I've got ... chocolate.
some chocolate
I've got ... sausages.
some sausages
I've got ... sandwiches.
some sandwiches.
I've got ... lemon.
a lemon
I've got ... banana.
a banana
I've got ... lemonade.
some lemonade