You should have either a crate, an ex pen, or baby gates to keep him out of the kitchen. He is still a baby and can't control himself, he won't be able to place on a bed the whole time you are preparing dinner. An ex pen with a bed in it is best as you can reward whenever he goes on the bed, but the ex pen keeps him out of the kitchen.
I reward with veggie scraps (a bit of zucchini or carrot or whatever dog-safe veggie I am chopping...), whenever she is on her bed, she gets some. Off her bed, not. Now when I start chopping she just goes and lays on her bed waiting for the scraps to drop there for her. But that took a year and a half, so you need to manage the situation until then.