Obese tiger salamander

Hello.

Our previously very sick tiger salamander is now doing very well. However, he started becoming obese before he was returned to his aquarium. I guess this was due to a long period of inactivity before he was returned to the aquarium.

I have reduced feeding to twice a week from the previous three. He eats super worms, crickets, dubia roaches and another type of roach I am unable to identify. Two or three of each at a time. I've heard that the superworms are very fattening and have reduced feeding them to only once a week.

Curious to know what others would do. Would you reduce feeding to once a week or keep to twice a week but far less food in one sitting?

Many thanks.

S.