https://www.se.com/ae/en/product/WHT20/20a-440v-surface-mount-triple-pole-isolating-switch-ip66/?range=61235-kavacha
I have one of these for my air conditioner outdoor unit disconnect (screw terminals inside the box). Something like this could work for a cooker if you select the device with current capacity rated high enough. website shows up to 80A. The 20A, 3-pole version cost 800฿ at my local electric shop.
For the cooker you might also consider having a disconnect near, but not behind. In case of fire, you can switch it off without putting your hands near / through the fire.