From Dragon of Desire:

The pizzacraft mod is unecessary bloat and actually causes issues with overlapping recipies with important pieces of other mods. For instance, Pizzacraft bakeware takes pirority over Iron Gears. Sure the thing is there to swap them but it makes it difficult to craft multiple. Pam's Harvestcraft and its supplementary, Cooking for Blockheads, has pizza and is normally the go-to for food mods. Also, adding that would allow you to remove the XL Food mod. This would let you swap the pepper plants and other plants in the random generation for Pam's Harvestcraft Gardens.