I am a really adventurous person related to food because I like to explore new food in the world. = I am a really adventurous person when it comes to food because I like to explore new dishes from around the world.
“related to food” → “when it comes to food”; “new food in the world” → “new dishes from around the world” sounds more natural.

I always want to try other country's food and I'm very curious about the recipe or the way of cooking they have. = I always want to try food from other countries, and I’m very curious about their recipes and cooking methods.
“other country's food” → “food from other countries”; “the recipe or the way of cooking they have” → “their recipes and cooking methods” (simpler and correct plural).

Food is very fascinating when it comes to look into it. = Food is very fascinating when you take a closer look at it.
“when it comes to look into it” → “when you take a closer look at it” (natural phrasing).