That is a common misunderstanding that He is going to write the Law of Moses, "HaTorah" upon our hearts.
Most people fail to fully understand the verse before it, Jeremiah 31:32.
He plainly declared that it would NOT be like the Law that He gave to our fathers when they left Egypt... which is the Law of Moses.
They say otherwise, or that He has given us a "revamped" Old Covenant.
No, this is a New Covenant and it is based upon better promises.
This is one where He actually gives us a new heart, and a new spirit.
It is the Law of the Spirit, the Law of Love that He writes upon our heart.
You do not want to steal, kill, nor commit adultery with your neighbor's wife if you are walking in the Law of love.
It is not something that has to be written on paper nor taught.
It is the Law of the spirit versus the works of the flesh.
*Romans 13:8 Owe no man any thing, but to love one another: for he that loveth another hath fulfilled the law.
*9 For this, Thou shalt not commit adultery, Thou shalt not kill, Thou shalt not steal, Thou shalt not bear false witness, Thou shalt not covet; and IF THERE BE ANY OTHER COMMANDMENT, it is briefly comprehended in this saying, namely, Thou shalt love thy neighbour as thyself.
*10 Love worketh no ill to his neighbour: therefore love is the fulfilling of the law
He did not list all the other laws here, neither the rest of the Torah. It is all fulfilled by walking in the Law of Love.
You asked "WHAT ARE THE GOOD WORKS OF EPHESIANS 2:8-10 ?
Walking in faith, which worketh by love are the good works and they spring forth automatically because of the change that He has made in our hearts and spirit, not because of a written law.
The Law was our schoolmaster to bring us unto Christ, that we might be justified by faith, but once faith is come WE ARE NO LONGER UNDER A SCHOOLMASTER.(Galatians 3:24,25)
For ye are NOT under the law, but under grace, which is "unmerited favor" you didn't earn it.
The Gentiles didn't have the Torah, but they still had good works without the Torah.
*Romans 2:14 For when the Gentiles, which have not the law, do by nature the things contained in the law, these, having not the law, are a law unto themselves:
*15 Which shew the work of the law written in their hearts, their conscience also bearing witness, and their thoughts the mean while accusing or else excusing one another;
The Law of love does not tell me that I need to grow my beard to be loving my neighbor. It does not tell me that I have to worry about where a woman on her period may have sat or touched so I don't become unclean.
It is a new and living way that is easy to follow by walking in faith which worketh by love.
As far as Sabbath goes, Hebrews chapter 4 shows me that every day is Holy unto God and that I have entered into His Shabbat by faith. I esteem every day unto the Lord.
Galatians 2:21 I do not frustrate the grace of God: for if righteousness come by the law, then Christ is dead in vain.