Does anyone else think it's a good idea to serve real food for immersion in roleplay

Well, I've said plenty of times the food would be prepared before the game maybe I'd let them know beforehand with a menu handout early on so they could decide if they want to eat anything. I also said that the food and/or drinks would be served during break periods where the character sheets are put a safe distance from the table.

For example before the planning phase fully commences I know that I'm gonna have the party camp with Elves or Half-Elves in Faerun So I create a menu handout with the following from the Heroes' Feast books along with Puncheons and Flagons

Quith-Pa

Elven Bread

Moonshae Seafood Rice

Greenspear Bundles in Bacon

Cherrybread

Elven Marruth

Chopforest

Elven Flatbread

Meal's End

High Harvest Puree

Evermead

Elverquisst

Feywine Punch

and 

Kinship Shrub

I would also have mini explanations of the ingredients so the players know what they want.

Quote from Samueltheslayer >>

I think using real food during roleplay to represent the fictional food being served at a Tavern, an Inn or a camp during a campaign would help with immersion. Books like the Heroes' Feast books or Puncheons and Flagons would work as well as the Juniper's Companion to Venturesome Cookery blog or other fantasy-themed cookbooks like both volumes of the Elder Scrolls cookbook and the Diablo cookbook and cocktail book or the Warcraft cookbooks, you may have to rename some of the recipes though for the sake of roleplaying.

For example if you're doing a campaign set in Maztica you can make Maztican Pan-Fried Corn Fritters, Maztican Bean Stew and Mayzcakes(all from the Juniper's Companion to Venturesome Cookery blog), Argonian Swamp Shrimp Boil (from the first volume of the Elder Scrolls cookbook), Savory Thorn Cornbread (from the Elder Scrolls cookbook volume 2) and Kaeth (from Heroes' Feast: Flavors of the Multiverse). You can rename the Argonian Swamp Shrimp Boil and the Savory Thorn Cornbread to something like Tabaxi Shrimp Boil or Maztican Cornbread.

If you're resting in a tavern in the Domains of Dread you can serve Barovian Butterscotch Pudding from the first Heroes' Feast book along with the various Ravenloft foods presented in the second Heroes' Feast book as well as The Necromancer and Hand of Vecna cocktails (from Puncheons and Flagons) you can rename them to something like The Lich or Finger of Death.

If you're at a Tiefling Camp then maybe you can serve Fire-Spiced Abyssal Chicken Kebabs (from Heroes' Feast) and the Hellish Rebuke cocktail (from Puncheons and Flagons) along with Sheogorath's Strawberry Tarts (from the first Elder Scrolls cookbook) and Sanguine "Shaven Fruit" (from the Elder Scrolls cookbook volume 2). If you're hanging out with Aasimar you can serve Bytopian Shepherd's Bread (from Heroes' Feast) and Fargrave Sweetrolls (from the Elder Scrolls cookbook volume 2) with the Astral Plane cocktail (from Puncheons and Flagons). A Dragonborn camp can serve Arkhan the Cruel's Flame-roasted Halfling Chili (from Heroes' Feast) along with Dragonberries (from Puncheons and Flagons).

If you're at a tavern in Droaam maybe you can serve the Pack Leader's Bone Broth, Troll Fat Jerky (both from the second Elder Scrolls cookbook), Orc Bacon (from Heroes' Feast) and the Ogretoe cocktail (from Puncheons and Flagons).

 For me this is perfect but it is a really hard one experience if you want to really create something from DND

Well there's instructions and lists of ingredients in the books and the blog so the hardest part is getting the cooking utensils and ingredients.

When the king awarded the party medals for saving the kingdom, i got some actual medals to give the players. 

I dont know if i would say it was for "immersion". It was more of a "oh cool" factor. One player pinned it on their dice bag, i dont know what the other players did with theirs.  "Heres a thing. If you like it, great, if not, dont worry, the game is moving on anyway."

If the first session of your campaign starts with the party meeting each other in a tavern, you could invite players to bring a bottle or can of their favorite drink, and when the tavern scene gets to the point where they all drink together, have everyone raise their favorite aluminum can beverage high as they toast to the adventure they are about to begin.

If  the party is going to be invited to a feast for an important moment, you might order a couple of pizzas (assuming all the players like pizza), and let players enjoy while they wait for everyone to show up and for the game to start.

But stopping the game mid session to serve food will stop the game for a chunk of time, and might actually be LESS immersive.  The interesting bit of a tavern scene is usually the roleplay that happens, and the revalation of story details.

The last tavern scene i had, the players met an npc to follow up on a job the party did for the npc and things had gone south on the nission. The players thought the npc had set them up and were angry and had questions, and potentially were ready to kill the npc. And during the roleplay, the party hears the npc tell them they were double crossed as well, and they learned important information which they then tell the party and the party suddenly has a new direction and mission.

The food was mostly irrelevent to the scene.  The party entered a tavern, ordered a round, and started talking to the npc.

If you stop the game to serve food, if you can do that while roleplaying the npc conversation, i suppose it would work. But if it stops the game and becomes just about the food, it might not work.

Dnd is a game of make believe. We pretend we are inna tavern. When im playing the dwarf npc who buys the party a round, i raise my can of coca cola and make a toast. The players raise whatever they are drinking, (mt dew, root beer, lemonade, water, seltzer) and they drink with me.  Having everyone drink actual medieval ale would take time and might distract from the game.

I just remembered something that might help a little and it was something i forgot about until someone asked me for a recipe.

You can give your players certain foods or recipes out of session so they get into their head what they are eating and smelling. Did this with a botched campaign, where I cooked for the group on a non-game day, and gave them the recipes. They thought it was a neat idea.
That was the day that I and one player found out he had Gluten sensitivity, and that another player thought we were going to be playing 3.5 and she didn't know there was a 4Th edition, but we went ahead anyway.

Then the place we would be playing got flooded and we couldn't find another, but they liked me cooking for them, so did that for a while.