Recommendations for Venice Eating Near St. Marks or Rialto?

Does "Reasonable(10-13)" mean 10 to 13 euro per person? In that case, just stop in any pizzeria that looks handy and have some pizza. Lots of places around Piazza San Marco.

Our go-to for a casual dinner in Venezia is NoNo Risorto, a bit west of the Rialto Bridge. They open at 18:00 for dinner. Rossopomodoro near San Marco is dependable. Always open, I think.

There are a row of restaurants along the canal close to Rialto. I suggest you walk by them to get a feeling for the atmosphere and then go 500 meters in any direction and look at the menus displayed outside the restaurants.

At all cost avoid eating in the restaurants by the canal close to the Rialto Bridge. The food is (at best) mediocre and the staff is surly.

I agree that NoNo Risorto is tasty and nice.

Going to any random place around either S Marco or Rialto is asking for a big price and small quality.

This is in between San Marco and the Accademia - try Art Blu Caffe. Comfortable, fun, good food, prices are very reasonable. I second NoNo Risorto - always eat there at least twice.