Fix the concourse's food processor for the NCR at their airport base. Buy all the food, throw a grenade in the corner and stand over it, let it 'splode, pause and eat all the food, unpause, wait a day or 2 for the restock, and repeat. Pretty quick.
"Yeah, yeah! Two words: more puppets! Yeah!" - The Tallest
I Raided the Ultra Luxe then bought everything I could from the various merchants then travelled to Jacobstown killing every Bighorner along the way getting 70-ish Bighorner meats, then headed to a campfire cooked turned them into steaks, dropped my health right down with the Grenade Machine Gun and used every single item food item I had without leaving the menu.