The potatoes are done when easily pierced with a fork but not too soft. (marisamoore.com)
Turn and cook until the salmon flakes easily when pierced with a fork but is still pink at the center, 3 minutes longer, depending on the thickness of the fillet. (blog.fitbit.com)
For smaller, thinner beans, check that they don't overcook by piercing with a fork halfway through cook time. (organicauthority.com)