When slicing the head of cauliflower, try to have as much stem included as possible. The stem is what holds the cauliflower into “steaks” or one large slice. You’ll definitely have some random small broken pieces, but hopefully you’ll have at least 2 slices that are whole “steaks”.
Grill Baskets - Some days we just don't want to bother with carefully managing every single chunk of cauliflower. Throw them all into a grill basket and grill from there. Easy-peasy.