내가 정크푸드를 한정한 방법

나는 정크푸드가 먹는 거라기 보다는 하나의 개념이라고 내 자신을 속인다

Your writing is hard to understand. Frankly speaking, it doesn't make sense.

Judge if what you try to say is next...

the way i set limit of "a meaning of Junk Food"

I think, the Junk Food is not a (real/true) food. Rather, To eat junk food is deceiving yourself and considering "Junk Food" as a common kind of Food pretendedly.

내가 정크푸드의 의미를 제한하는 방식 is a literal translation.

but I think "내가 정크푸드의 의미를 제한하는 이유 the reason that I set limit of a meaning of Junk Food" is better in a way of korean thinking.

나는 정크푸드는 진정한 음식이 아니라고 생각한다.

I don't think Junk Food is a real/true food.

정크푸드를 먹는 것은 자기스스로에게 정크푸드가 하나의 음식이라고 속이는 것과 같다.

Eating Junk Food is that deceiving yourself that Junkfood is one kind of Food.

*제한하다 ≥ 한정하다  (제한하다 is more common and used wider)

*제한하다  restrict, set limit --- used in gerneral

*한정하다  restrict, set limit   (제한하다)      +        decide   (정하다)

               제한하여 정하다, 제한한 후 결정하다, 제한해서 결정하다

*방법 ≒ 방식 (Both are similar in the dictionary)

*방법 is used when you express "a detailed and directed way, manner, method to solve sth"

*방식 is used when you express "an overall concept or form having a certain direction, idee to solve sth.

*속이다 lie, deceive

*~를 속이다

*~를 ~로/라고 속이다