Ideal solution? The current Israel and Palestine are united into a single state (known as "The State of Israel" in Hebrew and "The State of Palestine" in Arabic, the nation's two official languages), whose legislative powers are vested in a national unicameral legislature headed by the Prime Minister, and whose executive powers are vested in the President. Legislators are elected from one of the nation's districts (
modeled on the districts of Mandatory Palestine), with the number of legislators representing each district determined by that district's population. A Census is to be held every ten years to ensure accurate representation.
The President is appointed by the Prime Minister. When the Prime Minister is Jewish, the President must be Muslim, and
vice versa. In the event that the Prime Minister belongs to a religion other than one of those two, there is no religion requirement for the President. The powers and responsibilities of the Presidency are comparable to those of the President of the United States.
Equality between the religions would be the first principle enshrined in the new state's Constitution.
I have no idea how practical any of this is.