Papaya (aka paw paw) is about the best way to break a long fast. Try it. Then gradually add other fruit. Then salads, (also essential for fibre, etc, to kickstart peristaltic & bowel movement), then cereals/oats (for breakfast); any veg you can take.
Gradually add a sample of each of the other major food groups - eg pulses, then nuts, seeds, etc., until you're back to your normal diet. Leave meat, fish & dairy till last - they require the full range of digestive functions, which you cannot call on immediately after a long fast.
Don't try going back to a full range of foods immediately, or you'll risk some serious digestive issues. Allow almost as much time breaking the fast as actually spent fasting.
Highly unlikely your stomach was eating itself, even at 55 days. Having said that, there are good reasons why the Scriptural pattern is 40 days of fasting. Our Creator knows our bodies better than we do, and anything over 40 days carries known risks.
For this reason, anything over 40 days should only be undertaken while under medical supervision by a qualified professional who understands the physiology of fasting.
Most medics are clueless, and would throw up their hands in horror at the mere suggestion of any fasting, nevermind one as long as yours.
More info on how to break a fast.
If memory serves, I believe that elecrolytes are just about the only 'food' the Fasting Doc will sanction during a fast, and then at minimum effective amount. I'll post his views on this when I find them.
But he's big on 'listening to your body', so if you benefited from them (eg symptoms disappearing), then I'd say go with it.
As, promised. here are the good doctor's views on electrolytes:
Electrolytes are generally OK during a fast. But be careful not to stimlate the excretion of minerals by taking too much: The quickest route to a deficiency is often a supplement: Supplements are absorbed so fast, that their blood levels rise very quickly, causing the elimination mechanisms to be triggered. This elimination then continues after the absorption is completed; you may thus lose more than what you took. That's one reason only drug addicts need drugs to function.
There are many electrolytes in the body and many of them cannot be measured accurately as they are intra-cellular. Sure if you can have the most important ones (Sodium, Potassium, Phosphorus, Calcium, Magnesium, Bicarbonate and Chloride) checked by a reputable laboratory, that will help safeguard you at least insofar as those are concerned.
Our normal electrolytes comes from food. In the food they are typically associated with organic molecules and they are distributed throughout other substances. Thus they get released for absorption over several hours at least, as the whole "bundle" moves through the intestine.
A "supplement" is highly concentrated, so as it strikes the stomach, the acid there would release the minerals, ready for absorption. The whole lot would typically enter the bloodstream within minutes. Now our natural homeostatic mechanisms "estimate" the volume of mineral "on its way" by evaluating how much arrived in say the first half hour, then "calculate" from that how much to expect over the next few hours.
So if your body "expects" a huge load (based on the volume arriving in the first few minutes) it would need to prevent toxicity by activating the elimination of these minerals in anticipation. This elimination "picks up momentum" which is continued long after the (rapid) absorption is completed. This is the same mechanism by which "vitamin supplements" causes a vitamin deficiency and by which drug addicts would get overtly ill when they stop taking drugs.
The minerals I do allow to enter my system during the fast are those in a good mineral water, preferably of Dolomitic origin (Although most of my fasts are dry). I don't "take minerals" any other way during a fast. If you do, that would not terminate the fasting metabolism as there are no energy-containing nutrients or taste associated with them. Bear in mind that if you measure blood minerals (in particular Magnesium but also Calcium) you measure them in a location where a VERY small percentage of the mineral is located. Thus it does NOT reflect the levels in your body as a whole.
I would never suggest taking calcium without magnesium or vice versa. A very low dosage would likely suffice but once again, if it is highly absorbably (as with fizzy electrolyte tablets) the excretion may be triggered. Thus I only recommend Dolomite (the natural source of calcium and magnesium in the correct ratio) for those who need it. It has the added benefit of neutralizing excess stomach acid which is sometimes present in novice fasters.