Answer: According to the experts in the giant pumpkin field (no pun intended), the best way to "feed" pumpkins is with rich, deep, organic soil, plenty of water, and regular feedings with water soluble or organic fertilizers. This feeds the whole plant, which is what makes the fruit healthy and large. In fact, cutting a vine and trying to feed it "people food" is not only not worth the trouble, it's potentially harmful to the plant.
Here's a website that is chock full of info on growing large, healthy pumpkins:
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