instapot roast from frozen

3 lb frozen chuck roast
2 cups water
5 tsp beef boullion
1 onion

Cut chuck roast so it fits in the instapot. Brown sides of roast on saute feature. Salt both sides of roast. Put in inner pot. Pour in water and boullion. Place cut onion on top. Set on high pressure for 105 minutes. Let natural pressure release for 25 minutes.