Lasagne are long, flat, broad noodles which are ideally suited to layering in a baking dish to make a sort of noodle pie with an assortment of ingredients which may include meats, cheeses, and tomato sauce.
In the ancient world the bull was a symbol of strength and power. Every culture in the ancient world was connected to bull worship in one way or another. Many people would seek the bull deity for divine blessings, whether for rich crops and a fertile harvest or for victory in battles.
The bull is of course a symbol of strength, ferocity, obstinacy, maleness and power. So at a times it can represent your father, or an enraged father. The bull in your dreams represents the way you may have faced this power in the past. If you have faced it without love it will cause enormous tension and frustration. That is the negative side to the bull.