Or all of the groceries that you have been buying ? Take a closer look, what is your hand composed of ? What runs as blood in your veins ? What makes the nails or the hair grow ?
Or you have been doing some serious weight training and increasing your intake of protein. What happened to the chicken that you ate ?
Spend a moment reflecting and you'd realize that what used to be a chicken is now distributed in your body, as muscles or as blood cells. Or even as the layer of fat around your belly. Same with all the eggs, potatoes or whatever else you have been eating.
Before the slice of bread enters your mouth, you'd vehemently deny it was you, you clearly see the separation. Once eaten, doesn't the bread become a part of your body ? The body, that you are so attached to, and take it to be you ?
Look differently at people eating in the restaurant the next time, and you'll realize that all that is happening is transformation. Bread, meat, butter, vegetables, they are all transforming into human bodies. This transformation goes on endlessly in nature. This transformation happens to your body as well.
Look at your body again, it is the sum total of all the groceries that you have been buying each month, whether you are a vegetarian or non, it doesn't matter, it is just transformation of one form into another.
Who witnesses the transformation ?