Posthorn
: was called 'Tra la Gente' for some time. It's a recently renovated Italian place with quality food in a classy atmosphere. I don't know if they've already given it a name, but it's near the catholic church on the opposite side of the nearby roundabout.
Berner
: has fairly standard Swiss food garden seating for the summer. Tried it and liked it, but expect no thrills.
Landhaus
: again an old-style Swiss restaurant, though it's led by a Finnish lady. Plain but good quality food - bring your appetite because portions are massive in particular the 'Garettli' ;-. Please note: these guys aren't open on Saturday evening and the whole of Sunday.
Try the following restaurants in the order of appearance:
Kloster Wettingen
: the monastery is some 10 minutes walking from Neuenhof across the Limat. It also houses a restaurant, in fact it's the oldest one in Switzerland. Classy quality food, nice rustical setting and a nice selection of wines. Bit on the high-end regarding budget and a very popular destination at times.
Rüssler
: an old-style Swiss restaurant up the Rüssler hill. This is a favourable destination if you want to combine a solid meal with a nice stroll/hike - they're near a junction of hiking paths.
Er + Sie
: a bit of a drag. Standard pizzas & pasta, cantine ambiente and a confused waitress - kinda italian ;-)