Porting further material datum features and improvements.

code/modules/food_and_drinks/food.dm

@@ -6,7 +6,6 @@
 /// get_random_food proc.
 ////////////////////////////////////////////////////////////////////////////////
 
-#define STOP_SERVING_BREAKFAST (15 MINUTES)
 
 /obj/item/reagent_containers/food
 	possible_transfer_amounts = list()
@@ -51,5 +50,3 @@
 			if((foodtype & BREAKFAST) && world.time - SSticker.round_start_time < STOP_SERVING_BREAKFAST)
 				SEND_SIGNAL(H, COMSIG_ADD_MOOD_EVENT, "breakfast", /datum/mood_event/breakfast)
 			last_check_time = world.time
-
-#undef STOP_SERVING_BREAKFAST

code/modules/food_and_drinks/food/snacks/meat.dm

@@ -1,6 +1,7 @@
 /obj/item/reagent_containers/food/snacks/meat
 	var/subjectname = ""
 	var/subjectjob = null
+	custom_materials = list(/datum/material/meat = MINERAL_MATERIAL_AMOUNT * 4)
 
 /obj/item/reagent_containers/food/snacks/meat/slab
 	name = "meat"

code/modules/food_and_drinks/food/snacks_pizza.dm

@@ -10,6 +10,17 @@
 	tastes = list("crust" = 1, "tomato" = 1, "cheese" = 1)
 	foodtype = GRAIN | DAIRY | VEGETABLES
 
+/obj/item/reagent_containers/food/snacks/pizzaslice/attackby(obj/item/I, mob/user, params)
+	if(istype(I, /obj/item/kitchen/rollingpin))
+		if(!isturf(loc))
+			to_chat(user, "<span class='warning'>You need to put [src] on a surface to roll it out!</span>")
+			return
+		new /obj/item/stack/sheet/pizza(loc)
+		to_chat(user, "<span class='notice'>You smoosh [src] into a cheesy sheet.</span>")
+		qdel(src)
+		return
+	return ..()
+
 /obj/item/reagent_containers/food/snacks/pizzaslice
 	icon = 'icons/obj/food/pizzaspaghetti.dmi'
 	list_reagents = list(/datum/reagent/consumable/nutriment = 5)