Demand barking during our lunch/ dinner time

This has been something that has left my family exasperated and worried for our future over. Our 4 month old puppy keeps demand barking for food when we are cooking, whether we put him in the kitchen, away from the kitchen, or in his crate upstairs (usually his nap time, sometimes he will wake up and smell the food and start up). our house has a more open floor plan, so unless we stick him in our small bathroom or laundry room- we don't really have anywhere to put him when he demand barks, and idk I feel bad about putting him in a small area not to mention he's not fully potty trained so thats another risk. We've tried ignoring him, and he just barks until we are literally done with the food, we taught him place (he still barks from there and leaves place soon after being put there which might mean we need to keep training him on it) taught him quiet (he only quiets down for a little bit bc he expects a treat) and wait (he waits for a treat and doesn't impulsively bark or jump as much, but he barks if we are distracted or if he doesn't get fed within 20 seconds), and will start barking again as soon as he's done with a treat- I'm worried he's learning that barking= quiet command= quiet for a second to get treat= again barking after treat gone. We have given him kongs but he finishes them in about 20 minutes while cooking can take at least an hour. He's always been a stubborn little shit and I'm worried this is a hill we can't get over and this may carry into his adult life. I've tried looking on other questions posted that have similar issues, but none of them seem to have this specific problem. The advice also tends to be varied, with some saying ignore him, leave the kitchen whenever he's doing that (still need all my family to try this, also kinda hard when cooking), teach him quiet/ place command. My question is; do we stay consistent and work on enforcing on what we already taught him, or are there better methods to deal with this? The only one we haven't really tried is leaving the room when he starts up, is that a good method? and also, what worked for you? I care for him a lot, but this has genuinely started affecting how close I feel to him.