I'm nowhere near an expert on this, but if I were on my own and had to restart my gastro-intestinal tract, I would do two things: start probiotics, good ones, and commence with simple starches and a bit of fiber, maybe a boiled egg thrown in because they're such great food. So rice, noodles, a small beet, some kale or chard/collard greens, even a potato would be okay. The two concerns might be/might NOT be, electrolytes, especially in the two or three days after the feeding tube is removed, and not overdoing the fiber.

You should get plenty of instruction from the people providing you with care when you get released from the tube. Please follow that, and not my own prescription.